So what's left for Blackbeard tho? Will Luffy just straight up beat Blackbeard without any noticable powerup?
Well, think about this: Luffy has passive rubber physique but he can use several gears which are also several transformations. So Luffy had both paramecia (because of his rubber body and using its powers) and zoan abilities (he's basically mimicking zoan transformations with his gears) but now the only thing left is the production of his element.
Luffy's strawhat melts, so it's a hint that Luffy gets logia powers as well, possibly G5? If that's true, we have:
G2/G3: Paramecia abilities.
G4: Zoan abilities.
G5: Logia abilities.
So what could be his next PU? Is that even awakening? Because I think there might be a G6, which could be like that:
G6: Paramecia abilities, Zoan abilities and Logia abilities at once.
I think this will parallel Blackbeard who will most likely have 3 different DFs; Paramecia, Zoan and Logia. Luffy has just one DF but with all three DF categories into one.
Once again:
Blackbeard: Has 3 DFs of being Paramecia, Zoan and Logia.
Luffy: Has one DFs but with Paramecia, Zoan and Logia properties, thus it's basically 3 different DFs into one.