I still believe that Swen has semi-confrimmed that they are planning to give level caps for Acts. :-/
It did sound like that, but it would be an unusual solution. They could “cap” levels per acts with xp available to the player - I don’t know how “flexible” BG3 will end up being when it comes to story progression (aka. If you will be able to skip 80% of content and follow crit path only) creating over abundance of XP. There are definitely side areas players can just ignore at the moment.
My gues ... yes and plenty.
I mean right now Grymforge is just deadend.
Take it evil players dont even get many reason to go there ... just as Halsin team is strongly encouraged to ignore Shadowcursed lands ... speaking of them, Halsin team is suppose to get into Grymforge (as it seems) yet they cannot continue from there.
And yes im aware that location was probably not yet revealed whole since we have no way to reach the Temple of Shar.
Cpncidering this maybe, just maybe, Larians decided to give us level cap bcs they expected us to just follow main plot:
Halsin - Underdark
Minthara - Mountain pass
Githyanki - Creche (shadowcursed lands? dunno)
And ignore the rest ... but then someone realized that there is litteraly nothing stoping us from explore it all ... and potentialy triple or quadruple amount of our XP ...
In such case level cap (even if anoying for players) may seem like acceptable tool to prevent this.