I think 4 party members is enough for fun D&D tactics if they would just shift the focus from the environment and surface bombs and magic food to the characters and their abilities.
I would welcome the possibility for 6, but I'm content with 4. 5e is pretty flexible with skills so I don't feel like I need any particular class to succeed. I can have a Fighter skilled with disarming traps or rely on Short Rests for healing. And thanks to Larian I can carry chests or strange books back to camp for someone else to deal with if I can't do that on the spot, which is really cool. You can have lock specialists and arcane experts in camp too.
They can still easily nail the D&D spirit for BG3. They just need to tone down the extra stuff they took too far.
