I don't think it will ruin it to much becuase in multiplayer mana regenrates alot slower and that should handle most of the problems. Just be glad that they replaced secondary attack with saber throw. I was growing tierd of figure-8 swings being the only saber attack used. In jk2 i am positive that it will not be a matter of who can throw there saber the most.
Anyway like the other have said its going to not be to hard to counter.
"It is obvious we can not settle this contest by our knowledge of the force, but by our skills with a lightsaber."