If Wano was built as just "another checkpoint" for the story, I would rate it at least a 3/5.
But considering the hype around Yonkos, the hype around Wano, the development since Punk Hazard, all the hype from pre-TS (Kizaru destroying the SH's and they being sent away by Kuma, Luffy failing at MF, the "you're not ready for this stage yet"), it's REALLY hard to feel hyped about Wano, except if you're some powerscaling junkie, then I assume it must be quite enjoyable. But considering that fact that every arc we get more and more powerscaling feats, it doesn't hold any weight about the "quality" of Wano even by this kind of standard.
It's not like we can't have some kind of goofy characters in the middle of a war. All the "Captain Buggy" stuff during MF was actually funny as hell. But Tama? fuck that shit.