Now it makes sense why Sheryl hates Galaxy. It's so weird and has no greenery, no comfortable-looking cities or a decent pool of water. Plus, everyone is cybernetically enhanced. Very artificial.
Now I understand why she is so excited when she saw Frontier has oceans. This was explained in previous episodes that in the 2050s there are many distinctly different colony fleets with their own culture and aesthetics. When we see the name Macross Galaxy, we were looking for fleets resembling M7 or M-Frontier. Heck, even the escort ships are different. I must say Galaxy looks organic to me and very unique.
This leads me to conclude that some kind of political upheaval has occurred and the NUNS was created from this. I mean Frontier has a president that means it is a legitimate nation by itself but part of the NUNS. All M7 has is a Mayor although it can be said that is because M7's population was only 10% of Frontier's.
I hope the Macross Chronicle will explain everything to me.