Havent you argued before that Wit is maybe the most powerful attributes?
I don't disagree with you on this, so wouldn't a nerf like this be in order?
Wit being the most powerful is because other stats are way too weak. Even then, majority of the stats in the game actually has a purpose right now and will get better as the game goes on with a few exception
Con - It sucks because of how the physical/magic armour work that you can just grab int/str instead and still be tankier.
Mem - It gets weaker because level 6+ equipment from seeker camp like Feder the pig girl pretty much gives ton of memory. With so many +1 or +2 mem gears later, you end up having too many slots with random spells you never use except for questing purpose if you invest in Mem.
These 2 stats need a buff or some kind of game mechanic changes to make them better, like introducing more basic spells that actually eat 2 slots like Walk-in-shadow.This kind of changes will make Mem better especially if they are combat spells.
In case of nerfing Wit, the game needs to introduce some kind of "Team Initiative" to prevent the whole "Focus fire the same squishies on the first turn with your rangers to gib him right away" strategy that is almost impossible to balance without being super cheap in return.
% crit chance and so on are stuffs you want around because it introduces consistency to future build that relies on crit. When fight starts lasting longer than 2 turns, those extra crit chance will really kick in and work as a potential damage steroid.
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Also, Fin is the better one to get MS bonus, which will suck because you can already get MS from Scoundel bonus, Haste and Adrenaline.
At least with current Wit, you can always swap your knife char to either Spear or Bow as well with the Wit-Fin build because Scoundrel gives Crit damage bonus, allowing you to still do huge damage while Rage is down because you're not going to be swapping 2 knives back on for that AP cost. The MS instead of Crit chance will just nerf the versatility.