covaithe
Explorer
I have to say I most prefer covaithe's version, where you can train one additional power/feat if it's from a source approved since your last level.
There's a subtle distinction here; what I suggested was that you can retrain an extra power if the new one wasn't available at the time you got approved with the old one. That might be many levels ago. Suppose you're a human wizard, and at level 1 you pick magic missile, scorching burst, thunderwave, and burning hands. At level 2, you do something else. Then, before you reach level 3, AP comes out and is approved. At level three you can lose magic missile and scorching burst and replace them with AP powers, say Nuclear Meltdown and Summon Oncoming Train. At level four, you could still drop both burning hands and thunderwave in favor of AP powers. Or you could lose Nuclear Meltdown in favor of Magic Missile, and still retrain Burning Hands for something else from AP.