Yeah, I think I'm going to go with VennDygrem on this one. Thing is, it's mostly a fluff-based subtype gain--I don't really see much to be gained by getting it at 1st level, and it fits the flavor much more at 10th level.
I may change my mind. The dragonheart adept and the sublime shaper are also, technically, going to get a revision pass--don't know if I'll actually change anything, but I'll at least look--since they're going to be included in the Appendix on spellshapers and martial adepts. Said appendix will also include things like a variant that lets martial adepts take incantations. Possibly other things. Who knows?