Why Isn't Behesda not Making the Leigon a seperate Faction For Online!

So I Have Put together A few Ideas that would make what I think to be a good Faction Campaign. Like you could choose what city in Cyrodil you want to be From and From their you Grow up Seing your home being invaded many times. Then you go to the Imperial City Where you start your quests and leveling up. But when you reach level ten instead of attacking Cyrodil you protect it! And Just like in the other Factions you crown your Emperor (Or Empress :) And it Would be good For Die hard Imperials. So Yeah.

Tell me what you Think and would you do it? :)