I've killed several stormcaller warlocks with a single rocket and a single sniper headshot so they aren't as OP as you're making them out to be. I don't really mind sunbreakers because I've dealt with vanilla destiny bladedancers before and the only way to defend yourself is to use your super to cancel theirs, focus fire with your teammates, or run. I'm sure they'll get the same time to shine the bladedancers had before being tuned by Bungie.