I would too want some real politics kicking in the game.Players forming alliances , betraying in alliances, revenge, Helping a friend, Asking something in return for an alliance etc. User365 will look into this and incorporate some of these features some how I believe.
Some ingame relations are definetely good. But if you want to make a roleplay world I wouldn't reccoment to put mutch attension to this aspect. Once I've seen players making alliances (even if they were playing on different factions) just because there was a chance to do it but not a because whole game was focused on it.