Well for one, this would go a step further in placing DLC powers above the originals, because you can't make every power work like this right? Also, I'm assuming you mean might combos that don't drain your power bar at all? I think this would just require too much balancing for devs to hit across all powers, because you know they will make it so the might-combo dps is gonna outshine the regular might dps pretty much in all categories. If they make Rage like Celestial where your proposed might-combos are pretty tough to interrupt and you use little power and they hit crazy hard, you just created a juggernaut tank power for pvp. And finally, I just don't see what's wrong with just stacking precision on the powers that can combo lol doesn't seem like there will be much difference if you change to might, just giving devs something to do for no reason.