So ... here's the lengthy discussion portion of adding new factions, and why that would ultimately require a 2.0 in order to work.
tl;dr there's actually design philosophy challenges that necessitate a change.
If you followed X-Wing, you'll know they went through their 2.0 renovation recently. One of their biggest talking points in this was the issue of faction identity. What that boils down to is having a distinct feel between playing as Rebels, Resistance, First Order, Empir