Getting the level cap too late doesn't give you the time to enjoy it.
True, if a level cap will be in place for D:OS, the highest level possible should be something you get to play for a decent while. Too many CRPGs have timed their level caps to the final dungeon(s).
I agree with onyhow on xp scaling but to comment quotes above...
No! Why do u need to play at lvl cap at all??? Why do u have to reach lvl cap at all i dont understand u guys why u want this, its RPG u are supposed to upgrade your character when u travel through the game. You are not god and never will be. If you want to be god so badly im sure Larian can give u the code for godmode and have fun with it, but i dont want it cuz it kills everything.
If its the ending boss fight u are afraid that it would be too easy or too though then imo your fears are pointless cuz Larain has enough capable men/women that in world so rich with magic and other various stuff they will be able to make boss fight challenging (not put just a huge bunch of HP on main boss) for reasonable ending range of levels.
If u die u die and thats not smt thats wrong or bad in RPGs - u go back reload lvl up a bit and come again or be smart and figure some other way out.