NAval repair station and a lighthouse like the one from LOTR BFME2 ?
Maybe a diffrent colour of ocean blue? The general dark blue is getting a bit...old and eye tiring.
Neutral sea mines perhaps? Or some kind of tech building that does the hurricane ability (Yet again from LOTR BFME2 ) if possible. Somewhat a captureable naval sw....
LASt but not least; If the factions will have anphebious infantry, can gla have something simmular to it?
I've never seen a mod with a helihijacker, so Im asking for a naval one
(Note: I have no real clue with code so most of thoose are most likely impossible)
If you like the ideas then I can write some lore behinde it,