The problem with rushing is the same as in every other game:
The outcome of the match is decided very early which makes it almost impossible to be a cool fight.
There are no move restrictions in toribash so you can do any move you want.
In my opinion rushing is a tactic which can be useful so if you're dueling or playing in ranked servers or tourneys.
But it's a pretty annoying thing to do in unranked rooms because what most people are looking for in those are fair, fluid and awesome looking fights.