just thinking about what you said about basic ships for everyone, could these be designs for imperial navy ships?
No, they'll likely be from an independent contractor-corporation NPC within Remnant space however.
after all, will the remnants have any navy force, and if so that's what i'm guessing will represent it.
The Empire-Remnant will, but they'll be using their own special designs, as befits their status.
also with this, if a faction is based on the loyalist or renegade templates will the extra navy ships they start with be of their own design or a central imperial design?
Loyalists and Renegades will start with degraded versions of some Imperial warships. These ships have some of the same tech as their normal counterparts, but due to age and patchwork repairs, cannot be salvaged for technology.