That's just level 2. Hyo never considered [
this] level 3. He admitted it, so any application of level 2 does not go to level 3.
G5 was not using Level 3 until BG. Luffy was using his awakening powers. In G5 he can now influence people or things into his elastic nature so he didn't need internal destruction. He was converting Kaido's body to rubber changing his durability. Luffy's haki aspect pointed out was used to overpower Kaido's own haki DF negation.
No one but Luffy and Big Mom has applied its use of Level 3(according to Hyo explanation). Your examples for aCoC barrier are level 2 aspects. Garp is a maybe right now for Level3, since it only makes logical sense that he has it being a brawler and non weapon user. But it's still a Maybe for now.
I'll just address these two points since we were mostly agreed on everything else.
If you make a big enough barrier with level 2 and imbue it with CoC then you will be attacking without touching. Hyou never considered it attacking without touching because his barriers were too small to do it. But if, say, Galaxy Fist is level 2 CoA as you acknowledged is a possibility, that would undeniably be considered attacking without touching.
Yeah possibly
See now I'm confused. Portrayal-wise, Luffy used the exact same technique as Rogerbeard used - we can infer this through Oden and Law's statements. So if Luffy was using level 3 CoA, then it's highly likely that WB and Roger were too. Furthermore, you just said that you believe you can't 'not-touch' using only level 2 CoA or did I misinterpret your response? So even according to your understanding, Rogerbeard must've been using level 3 CoA no?
Furthermore, Rayleigh is an ACoC user. He was seen walking and emitting black lines vs Blackbeard. Yes, I'm aware other characters have emitted black lines and it's not necessarily ACoC but let's be real, it's Rayleigh we're talking about here. Rayleigh was emitting black lines at a time where Oda is slowly revealing to us who all the ACoC users are through the emitting of black CoC lines. Plus Zoro is an ACoC user so it's safe to assume Rayleigh was too considering Zoro hasn't reached prime Rayleigh yet.
Rayleigh is also a level 3 CoA user. We know this because Luffy used level 3 CoA to destroy the handcuffs. Yamato couldn't do it herself because she doesn't have ID CoA to destroy the cuffs from the inside. If Luffy used ID CoA to destroy the cuffs, then so did Rayleigh as they performed the exact same feat. Furthermore, when Luffy saved Hyo by removing the handcuffs, Hyo was shocked that he finally managed to get it right which means destroying the handcuffs is a level 3 feat. Hyo is a level 2 user, and he couldn't do it himself. So Rayleigh can also use ACoC + ID CoA.
Additionally, Sabo may also be a level 3 CoA user. He destroyed the ring from the inside. If he has awakened ACoC then he'd also go into that category. I said Shanks might because let's be real, it's Shanks. Bro's probably maxed out his Haki, especially if he's seemingly copied Roger. Garp is a solid bet too, as you acknowledged.