The problem is martial class gear is a massive power creep, they get too much benefit off the extra attack from thief multiclass, and speed potions/Haste are BROKEN. Paladin Smite and Half-Orc racial also needs nerfing.
This isn't an MMO, it doesn't really impact anyone else if these things are strong and do a lot of damage. You can restrict yourself by not using them or by building your characters around weaker builds. If it were a MMO, I might agree, but since it's not, there is no impact on the other player base for people using builds or features that are powerful. I think given the complexity of some classes esp when multiclassing, they won't be able to nerf enough of the OP things in the game to prevent cheesing or overpowered builds. Balance with this level of character customization and class options is really difficult.
I don't really think nerfing is the answer, I'd rather see balanced difficulty improvements and adjustable settings similar to other D&D titles that let you select various features as part of the difficulty adjustment. Adding new bosses or battle content like an arena would be a nice option also.
