Congrats on your first game!
Ya, I'm not sure how the rules are on outsourcing mechanics. To some degree, I feel like most of these require some sort of outside knowledge of what an RPG is supposed to be, and a few seem to assume at no instruction that we're playing d20. So IDK.
I guess maybe part of me is fine with being just another DnD world. I think that's sorta what it is, just with some extra mechanics on top of some assumed baseline. I suppose I would have rather the mechanics be more novel inclusions, systems not included elsewhere in the mainstream. IMO there's no reason to spend precious words detailing HP when most everybody reading this has their own way they deal with the problem that solves to begin with, and much the same for stats/abilities/etc. I'm here to find new tidbits that I can't get in huge high-production-value blockbusters, stuff I can patch onto my table. But that's me, and certainly not everyone.
We probably just have different visions of the contest, which is of course fine, but in terms of how I would use it, I'd rather see more appendages than bodies.
Good luck!