1) explosions: Occulus starbase
Sometimes it just detonates with one or two very small explosions. I have no idea if its related to some dynamic grapic setting tryign to conserver resources. Its not always, but it happens occasionally. I think a starbase should go down in a glorious boom. Its kinda disturbing the experience a bit.
2) fleet grouping: autojoin, Rapture
a) If autojoin is disabled and a fleet is in the gravity well ships get added to the fleet regardless.
if a Rapture "steals" frigates they also join the fleet (autojoin disabled) and even worse: some ships belonging to the fleet LEAVE the fleet.
You might really look a bit into fleet behaviour, there seems to be quite some inconcistencies.
3) antialiasing
It was mentioned already but for the sake of completion i mention it again. If you use antialiasing and zoom out, sometimes, from a certain angle you get artifacts.
It kinda spoils the otherwise impressive optics quite a bit.
4) Advent Herald
The textures seem a bit blurry if you zoom out wich is kinda strange because close up it seems okay.