Hexblade will probably easist to implement. Use the pact of blade and make it give additional spells (i.e hex blade unique spells) and make the attack and damage rolls use Charisma. Will probably play a modded hex blade in December 2023 after completing game vanilla (Larian should stop patching the game in that state for about 1 month until mid-january. 2024 So it gives a time to get all the critical bugs fixed.
I suspect Larian will implement some sort of respec mirror or well of memories where the player looks in the mirror and the game lets them change their class. As some people will try the multi-class and probably screw it up.
