I agree with you that Baardvark or someone creating a mod for the soft CC and other stuff might end up being best option to tweak the game. I would try it out.

Although my preference is never making players weaker, rather just making enemies stronger/smarter. And actually think Larian is doing a pretty good job so far.

I have to admit if enemies teleported my team into stun clouds as much as I do to them, I might totally change my view on 'hard CC' issue. Also if all enemies start having all immunities effectively making CC useless, a mod might make the game more fun.

I would just ask whoever makes a mod to try to make it modular rather than all or nothing.