MoonSong
Rules-lawyering drama queen but not a munchkin
I meant one free use per short rest of any Metamagic the character has which would keep keep it's usage as often as the die from Martial Adept which is once per short rest as well.
But compare the abilities themselves. Martial maneuvers are the core of a subclass, Metamagic is the core of the class, Martial dice are recovered on a short rest, Metamagic uses recharge on a long one. Having three warrantied metamagic uses per day is nearly on par with what a sorcerer can expect at low levels, besides there is far spell, or subtle spell and there's twin spell and quick spell. Some of them are more powerful than the others.