Lol, Gundam was and is a super robot franchise with a coat of real robot paint, except for a couple notable exceptions. It just spends a lot of effort trying to explain away its super-ness.
This would be a pretty limited scenario, presumably only against rebel colonists or other protoculture sub-races (which all seem to be fairly primitive). I don't think action against Zentradi or Supervision Army forces would need any deniability.
I’m curious to see how they’ll do the VF-19F/S. There are two pretty different wing line art shapes. Yamato leaned into one version; will Bandai do the same shape, or the more delta shape? (I’m fine with either, just curious)
A million people is orders of magnitude above what you would need to minimize recessive disorders. I suspect the hereditary diseases have more to do with the cloning itself than limited numbers, although they do tend to complicate other without some management.
A company called Unix Square is making Robotech-licensed (I think?) VF-1's with some very very odd proportions and creative liberties.
https://www.facebook.com/unixsquare
http://www.unixsquare.com/
Just FYI. I don't think it's my cup of tea.