To me it looks like it is to address the miss miss miss issue that gamers on another side will complain about it because it's a common complaint in TB games.
And ... Instead of enemy armor deflecting crossbow shots, we have now enemies that at low level can sustain dozens of crossbow shots.
Vincke could give hidden +5 bonus to hit after you miss and the same bonus to the enemy. That way, if you have 50% chance to hit, you will NEVER miss 3 times in a roll. If you have 5%, after a couple of misses, you will gonna hit.
And asi've said, it RUINS spells, not only offensive spells but also spells like sleep which are life saving on earlier BG1 levels. And completely worthless on BG3.
I fought today an goblin army on a massive battle goblins about 30 combatants few allies that are mostly useless. At lv 3 goblin archers that have 20 HP goblin shock troopers that have 50 two Giant spiders HP45 and an Ogre 60 hp and 2 spell casting shamans HP 35 and one Boss character That had about 50 hpAnd 4 goblin explosives that deal just Minor AoE at 20 HP Is this Ven a fair encounters by Amy design standard?
its ok... just add more explosive barrels to deal with the bloat. Balance resolved!
The point of D&D is to play with powerful heoric guys, not gimmicky stuff.