Not quite accurate. The problem is that barrelmancy is not a cheat or an exploit. It is a mechanic that is intended by Larian,
I agree with you on priciple, that said in my playthrough of BG3 I didn't find barrels to be that prominent. I think one needs to go out of their way to abuse the system. Advantage with backstab or hight advantage is a plague, which overrides all other tactical considerations in combat.
