To increase the usability of some lesser used sets, is it possible to add +Damage to the Mez and Debuff Invention Sets? It could be a lesser amount than the offensive sets (maybe around 60% Damage for a full regular set, 80% for purple sets.)
This would really open up a lot of sets that are usually ignored, and create a wider variety of builds. I think some players would like to build for enhancing secondary effects to their powers, but the zero damage enhancement is just too steep a trade-off.