Except for the stupid ways in which it is exploited. I've seen some pretty stupid ways of people hogging points. Like ramming shards on purpose just to get points from healing, while letting their team mates die so they can't out damage them.
Yeah, that does seem to be an issue. Somebody suggested in another thread to eat the shockwave attack on purpose just to heal it off. I guess people will find a way of exploiting anything.