I think changing character action animations is a step too far due to the amount of variances but in my head it would go like "Small visual energy burst by the monster with maybe each melee DPS getting a different colour. Then a satisfying *Thud* or *Ch-CH* sound?

I have always been anti-positionals on the basis of them being unfinished due to lack of feedback and unclear hit zones, better feedback and a scaling back of true north would legit fix most of my complaints