Hi!
I'm so glad to hear that you liked the game! And yes, Galaxy Angels had to have its name changed; although I was not informed on the exact reason, I believe it had to do with the fact that the title was one letter off from another series called Galaxy Angel.
It's nice to hear that you are interested in the lore. It was actually written out long before Blossoms Bloom Brightest's story was outlined. Where this was a Yuri Game Jam VN that was written in about 30 days (but had to be delayed due to the art assets), the lore was actually written for another title, with this title meant to merely be an introduction to the universe.
Now, I'm not sure if that title will ever see the light of day at this point, as the game's lore also seems to be the thing that bothers people most (in terms of those who disliked it). Even if we included a .pdf with explanations as to what all of the concepts were based on, I'd be afraid that wouldn't help. But, I am glad that someone enjoyed it, haha. I suppose I'll have to wait and see how Galaxy Girls does.
Thanks so much for playing!