I agree that the PoM buff with 2.3 is perfect the way it is and doesn't need to be changed further (pending future changes of course). On the other hand, SoS's fixed MP recovery will need to be addressed in the future. MP cost per skill will continue to rise as future patches raise the level cap, and at some point down the line SoS will need to scale like Aetherflow in order to be effective (as it stands now, it just won't cut it once a single Cure costs 600 MP and all the other spells are over 1000 each).