Alliance are a serie of different mods. On the Star Wars GC, you can play the civil war Empire vs Rebel era + Black Sun and soon the Republic and CIS.
I have changed the GC by stages by a new Total War GC where you can play with two sizes of galaxy against all the factions, just now there are two changes, you can first optionally disable the IA from Chiss, Hapan, Hutts and Corporate Sector and after it with other option, you can deactivate the IA from CIS and Republic. I made this last change if you do not wan play a GC where these two factions are fighting against you.
Other great addition from the GC are the heroes, they are limited, when you lose them one time, you will lose them forever. However by example with Daala, when you lose the Gorgona, you will unlock the Knighthammer. However, most of the heroes must be bought at different planets.
These are the main new features from this GC. Perhaps I will export at a future these limited heroes to other GCs.