Interesting setup but one that would not appeal to me. For one, I don't like psionics which seem to figure prominently. For another, I don't care for my PC to be a reptile. If you were a player/ref I've known for some time, I'd give it a shot but I'd have to say it would be a provisional shot: I'd try it for a while with the expectation I would probably get into the setting but would like the right to move on at some point. Not to end the campaign too early but turn it into a shorter rather than a longer one.
Is it fair to ask that of a referee? As restricted as the race and to a lesser extent the class options are, I would say yes. Again, I'd give it an honest shot and would expect the premise would actually grow on me but I'd like to have the chance to move to something else at some point if it didn't (say after about 12 months?).
I'll freely admit that all my objections are aesthetic ones but I'm entitled to my own sense of aesthetics as well. And it wouldn't be fair for someone to say "well you ref then." I usually ref and the point is to give someone else a chance to ref at times.
If I walked into a game store and this was one of several campaign options given by refs I didn't know, to be honest, I wouldn't select it most likely.
I like your write up; it's a reasonable length and gives enough information on the world and initial character decisions.
Couple other comments:
* Kobold isn't really a race choice. Moreover, you only want one gith so the race choices seem to be 1.2

* If you have any indications that your players are a little put out about the race or class choices, consider easing up on the one you feel is less important for the setting.
* If someone really, really doesn't like gith or dragonborn, consider allowing them to take something else but I'd also feel free to make them put extra effort into the background
* Do dragonborn really hatch? The females have breasts although I suppose they could be monotremes or the like.
Anyway, looks like some great thought into the campaign and I wish you well! I thought I'd give my honest feedback which is more lukewarm but feel free to ignore it
