Odd how this is empty.

Would an entirely Abyssal based version of the game too much to ask?...

It is something that I'm quite interested in, and I have heard people wanting this. I'm assuming you mean a reverse role version of the game where you fight shipgirls and play as the Abyssal characters.

Yes,but since shipgirls are far too specialised,each character being unqiue beyond usability as commonly faced foes,a more straightforward and still applicable method would be to fight other abyssals.

Rival factions fighting for dominence in an area,something like how the Covenant from the Halo series would fight itself because of how factionalized they are.

That would also help to save time on making it.

How about the Escort Princess?