It's nice to hear that the project is being resurrected - I wish you all the best
May the Force be with you
!!!
The main problem is that even after 3-4 years of your hard work nothing was released to public/
was left incomplete
...
My advice is simple:
work in small parts,
1. Basic "Base" release
finish the basic craft (X-W,Y-W, Z-95,T-F, T-B, a few freighters/utility craft 1-3, a space station, CRV. Nebulon-B, Dreadnought and it's ok for a beginning - a period between episode 3 and 4; as it is generic and the craft can form a strong basis for the future releases - and can represent both Rebels and Empire - these capships were used by both sides of Galactic Civil War) and balance the basic weapons (lasers, ions, turbolasers, concussion missles and proton torpedoes)...
Throw it away to public without more complicated ships (even such a SW icon as ISD!!!),without any missions
but make it stable, nice looking and include FRED so that people can start making some missions
It will consolidate your team, bring public attention and start a completely new chapter...
2. Ship/weapons packs for base and separate missions/campaigns
Think in TBP terms - base and missions
To speed things up don't alter the which thigs/features which were balanced by betatesting and were included in previous base releases, but make sure that the new ones are balanced and properly working
Add whatever ships you like as long you keep the SW feeling right and a logical gameplay
And don't try to do everything at once as you will spread your effort too much and needlessly waste time...
Hope these simple methods will help you a bit...