I had an idea for Energy Blast...
First off, Power Push on Blasters, Defenders, and Corruptors should do damage like the Sentinel version, but besides that...
Change Energy Blast>Aim into Power Vacuum.
Power Vacuum gives you +ToHit and +Damage (and +Range if you're a Sentinel) and the first attack you use after activating Power Vacuum creates a location based Inverse Repel effect for a few seconds at the location of its primary target, or at your location if you hit Nova first.
The idea is the force of your attacks is so great it not only knocks enemies back, it actually blows the air apart causing a suction effect in the aftermath.
Mechanically, you would still have to be somewhat strategic about not knocking things back chaotically, and there would still be plenty of advantage to KB2KD IOs, but the set would have a built in way of keeping things collected, at least somewhat.