Some major powerset balancing. Especially for the defensive powersets. Some taunt auras are far more effective than others, some power sets give far more protection than others, and there is a rather obvious difference in tiers there. Others that could use some tweaking would be the support sets. Trick Arrow for example is heavily shunned. Even though it debuffs so many different things, the debuffs don't have the same impact as other sets. Basically, go back to the Stats you posted a while back and figure out the reason that certain powersets are so unpopular. If those reasons can be fixed, that would be awesome.