I know it breaks the pattern, but I'd like to see a parallel feat to Draconic Legacy, with requirements of being a Drake (and maybe Saurian, he can get both) that works better for them, and could then be a decent replacement for the DL's first level benefit. Let's call it Draconic Birthright, perhaps it could tap more into the majesty side of dragons, perhaps an intimidate version of Charming, possibly based on their existing Reviled quality. Or something else entirely.
I'd also like to see an alternative Game Breaker for the DL that would suit most drakes better. I don't think being able to turn into a puny human adequately rewards the drake aiming to be the ultimate dragon
Maybe that's the place where Truely Massive should return, with a few extra benefits.