And here I'm again trying to understand from where people got this idea that there will be hard level caps per Act on full release. I can't even remember a game that would have such stupid feature.
In D:OS2, when you got to the "intended" level cap for an act, any further XP you got was crippled into virtually nothing, so that you were effectively level capped by act, no matter how thorough you were - then when you got to the next act, XP levelled you quickly again to the next cap for that act, where again, it hit the next 'wall'.