The benchmark I would say is either Arlong Park or Ennies Lobby so using those two arcs as 10's for a reference point, here goes:
Return to Sabaody & Fishman Island - 3
- Nostalgia is the main reason I give it a 3 and the fact that we got to see a few of the SH's powerups was also really cool.
- Didn't like Hody as a villain, thought it was just a poor copy of Arlong
- Fisher Tiger was a really cool character and I liked his flashback and I liked Otohime as well
- Shirahoshi was the worst character ever written, she had no meaningful contribution to the story and I hate that she was poseidon because that means we have to see her again.
- Sanji's nosebleed was horrendous
- Pacing was atrocious
- Return to Sabaody was really good and I liked the reunion
Punk Hazard - 4
- Not too bad, but too many gag moments really ruined it for me
- Vergo was an awesome character as well as Caesar and its always good to get more info on Vegapunk.
- Didn't like how Smoker was made so weak
- I liked Sanji's empathy for Kinemon, I always appreciate Sanji's kindness which is why I was so angry that he just left the kids behind in the next scene. Terrible writing from Oda to make another character look good.
- Felt really bad for the kids and I liked how Nami stepped in and showed her maternal side, the only time I have ever liked Nami to be honest
- Monet was a trash character but her backstory was sad and Tashigi was just pointless in the arc.
- Loved Sanji's entrance against Vergo but didn't like the fight and the infamous cracked leg
- Trafalgar was a badass!
Dresrossa - 1
- Too long and the pacing was probably the worst I have ever seen.
- Doffy was a good villain but not even he could mitigate the horrid pacing of this arc
- Hated how the SH's were split
- Cavendish was awesome and I loved his character, really hope we see more from him.
- The best part of the arc was that we got to see one of the best characters in all of OP,

, Fujitora.
- Hated Rebecca who was just a Shirahoshi 2.0 but loved Viola and her interactions with Sanji. Nice to see a lady finally reciprocate Sanji's passion.
- Felt really bad for Riku and Homing and they were some of the best flashbacks I have seen in OP.
- Zoro's fight was pretty good (even though I don't like the character)
- I loved the formation of the Grand Fleet!
- Finally, Gear 4th was awesome!
- This is my problem with Dresrossa, there were so many awesome things to take from it, but the pacing was so atrocious that even those awesome character reveals it was still so boring.
Zou - 7
- Really solid arc! The pacing was so much better than Dresrossa and each chapter was a good read.
- Loved Inuarashi in it who was a badass and of course the reveal of Kaido's right hand, Jack!
- I thought the Minks were really good and with the atrocious reveal of the Dwarves in Dresrossa it was refreshing to see the Minks.
- Loved the bond between the Minks and the Kozuki clan
- I didn't care for Raizo's design but thought that it was funny all the same!
- Finally loved the reveal that Sanji was a prince and was really hyped to see his family (This feeling didn't last in WCI) and I loved how brutal BM could be! Oda really wrote that aspect of her character really well in Zou, she was utterly terrifying (Again this wasn't the case in WCI)
WCI - 0
- The worst plot contrived arc in one piece's history, because it promised so much and delivered nothing!
- The character of Sanji was butchered in WCI, and I thought that it was a disservice to all the fans of Sanji who had stuck with the character for so long. Sanji's entire character took a 180, from a badass and intelligent gentleman to a sniveling damsel in distress.
- Also, Oda hyped up this mythical evil army that terrified the North Blue and inspired the marines to portray them as evil to show the strength of the Marines and what did we get?! We got the Vinsmokes! A bunch of sniveling cowards whose patriarch, the man who was supposed to lead a mythical evil organization, who was, in the end, a weak loser. The expectations were for the Zoldyck family and instead, we got Team Rocket. If the marines wanted to show their strength, why would they pick Germa 66?! I could imagine the giants, or the samurai of Wano or something else, but instead, we got the Vinsmokes?! When you thought of a Scientific squadron, especially being a fan of the Power Rangers, and were instead exposed to the Vinsmokes, I couldn't help shake my head in disgusted annoyance.
- And in the end, Big Mom, do you remember that feeling of sheer terror for BM in Zou and Fishman Island, yeah, that went to crap in WCI, when we got a fat overgrown child, whose character was dragged out and spent far too much time in the mud. How is she even a Yonko?! Even Kaido has his quirks but you still feel like crap this guy's a beast, but BM brings shame to the title. Also, the idea that she would kill the Vinsmokes when nowhere in the past has she ever done that to any of her alliances was the height of plot stupidity. Good character designs but the women of the BM Pirates were treated like absolute crap.
- Liked Pudding's character and thought she was a good match for Sanji!
- Didn't like all the combat focus going to Luffy as well and again they suffered because the crew was split.
- I'll tell you what though Cracker is probably the best-designed character in all of OP!
Reverie - 8
- Great arc! Great Pacing! And I actually like the Raid Suit! So win-win!
- Every chapter was awesome and the reveal of the big baddy was awesome. I also liked Mjosgard! Also like how Chaton and Momousagi were made canon in the arc and how that gives so much more depth to the Marines.
- I didn't like how Ryokugyu was teased and thought it was unnecessary for the dragged out reveal!
- Didn't like Rob Lucci as well, you would think that after the Ennies Lobby fiasco he would learn his lesson, but he still seems like an arrogant punk.
- Stelly was pretty funny!
Wano - 5 (Pretty decent arc as of right now but a few things that brought it down)
- Love the character reveals and the motivation to take down Kaido!
- Also, Kaido is quirky but at no point do you underestimate the power of the man, something that should have been done with BM.
- The reveal of the disasters was awesome!
- The best part for me was Sanji's RS reveal, my man going to be tearing it up. Also after the fiasco that was WCI Sanji, this was in a very long time we got to see OG Sanji back. All his character traits were on display, his tactical wit in taking out Page 1, putting his crew first, his cooking, his sheer badassery, his compassion for Toko and his fighting ability. This was a big relief to me and many Sanji fans I am positive.
- Udon was like Dresrossa, full of pointless and horribly paced storytelling. Kawamatsu reveal was dragged far too long and was just painful to read every week. I don't really like Orochi but I can agree that his character is well written!
- Don't like Hyori/Komurasaki and the fact that a little girl is basically an apprentice prostitute. That is messed up on so many levels.
- My bid problem, too many things are getting off-paneled and the start of the war is being dragged out. I get the flashback is narratively important but we need to see the war asap. However, one thing I appreciate from the flashbacks is the confirmation that my man, Scopper Gaban was a prominent member of the Roger Pirates and a beast.