RPG but in a new way?

I was thinking of a Multi player game where a character would be able to have the option to decide FPS or 3rd persective view, but when you reach a battle, it'll be RPG like. There are 2 teams online, a descent big map (urban), 12 players on each team, when a player reaches a enemy... RPG battle system apears like FF, it can warn other teammates about the battle so that they can hurry and help their friends fight before he/she dies over powered if the other team has more of their team in the battle. Experience can be earned by completing objectives, items and weapons can be choosed before you play, extra items and weapons can be found when defeating an enemy. When the battle is over, you can have that option of an FPS or 3rd perspective. hmmm sounds confusing.......?

Just wondering if it's possible. It would be a cool feature.