Of the truly necessary fixes in the latest versions, the Berserk bug is the only one that matters. It hasn't bothered me yet, although I play 2v2 against fish players, and it seems they only win because of this bug :P :D But honestly, I wouldn't install the update just for that.

In general, the intentional use of Berserk is a problem, as it creates unfair situations in the game. For example, in a 2v2 match with Nami, it shouldn't just be banned because it's a real bug; there should be a penalty for using it.
Basically, a hero with a magic power of 1 casts Berserk on a unit, and it just stands there without moving, watching as archers shoot it down for an entire round, and even longer, until it dies. It looks like the unit is blinded, but if it's shot at, it doesn't wake up; it just skips its turn every round.
Overall, if this can be fixed, it would be great.