Umm.... So, there's Gridania, Ul'dah and Limsa... that's 3 city states in the alliance. You did read the background on this yes?

You know there's already two 2-team modes already, right? One just came back.... Rival Wings.

Aside from that, it just sounds like sour grapes leading to these ideas. Without RNG in frontline, battles would be very dull and flat. People would still do silly things and screw up. At least with 3 teams, there's the possibility one might realize the lower two need to focus on the team in the lead.