The addition of another faction would unbalance the AI expansion, each faction currently has a set amount of rebel settlements surronding them to allow the AI expand early on. Throwing in another faction isnt difficult, maintaining a good mod balance that helps the AI provide the player with a decent challenge is where the real art of modding is. Im happy with where V3 takes this.
The Tahar have had a shake up for version three gaining some good and powerful new units, they will prob be the strongest of the muslim faction in V3
So I'm sorry but I wont be giving permission for any non-development team sub mods at this point.
This isnt for any ego reasons, but rather I always attempt to give complete support to users, once people start adjusting the base game, I cannot offer this support, since I cannot replicate there game situation if the filesets are not the same. One thing that I have always been proud of is the lack of CTD issues with Thera. The mod is VERY stable, I cannot continue to maintain this level of stabilityt if poeple are plugging sub mods into it.
(also Many Romans followed Mithras (the god the romuli follow in the mod, Mithras was a sun diety)