What was initially conceived as a mod to introduce X1's Remnant to Battlefront 2 using assets from FRD's cancelled game gradually evolved into a general post-Endor mod. Battlefront II: Expanded - The Post-Endor Era strives to provide an expansion to the base game with new models, vehicles, weapons, and maps representing the different factions of that time.
By "Minor" Faction", what do you mean ? Are those like Geonosians and won't be playable but only present as an annoyance ?
They will be playable.