Too early to tell. I haven't finished the game. The cast so far is okay, not an amazing cast like Mass Effect 2 and I really wish there were more human females. Or little people. Why are there no halflings/hobbits, gnomes or even dwarves in the party? Did we really need a githyanki AND a tiefling? Lae'zel was enough. That's what I'd change in BG4, some more traditional fantasy fare.
So far I really do like the new Wyll, I like Gale, Lae'zel and Halsin. I am actually agonizing over who I will kick out when Jaheira and Minsc come along. And I am really looking forward to joining Minthara, her assault on the grove was an amazing fight. I hate how you can only get the coolest Drow Matron ever if you aid a bunch of racist goblins. It will be worth it.
I really hate Shadowheart's cringy voice and her faux goth personality. I hate everything about Karlach too, good thing you can kill her.