No.
I think that leveling up is an issue in and of itself, and not limited to casters.
I play BG3 on Stadia using Chromecast and a Stadia Controller. None of my characters have leveled up ... at all ... since Patch #3 dropped. None, no matter what they've done in game or how much of the game they've run through. I've got characters in the Underdark that are still level one.
Not having access to higher level talents is not what I expected when I purchased this game, even with normal early access issues.
