Dragonborn might be decently strong in BG3. Their elemental breath is almost definitely going to combo with ground effects and interact with explosives, so gold/red/brass dragons are going to find situations where their breath can end entire fights.
But then you have the resistance. I imagine black and copper are going to be incredibly good in BG3 just because so few things resist acid AND every goblin in the universe seems to carry a vial of acid on their person at all times. Imagine taking on the goblin camp with a character that takes half damage from their acid vials and can spit acid right back at them.
Green might also be stronger than you'd expect. Larian has a tendency to assume all poisons everywhere are explosive gas, so there might be some synergy with blasting enemies with poison and then setting fire to the poison mist or something. If nothing else having resistance to all the poisoned arrows in the game will be nice.
