So it's been a while since I posted that I was working on v5.3 - it's still in progress, though very slow due to personal issues.
However the other issue is Rogue 1. The new film coming out presents a wonderful opportunity to introduce new ships and characters that fit right into the appropriate timeline. What I really want to do is include much of this new content in the next release of RotC.
So thank you for your patience, hopefully v5.3 will be worth it!