Yes. Map rules are not going to be changed. But... if you were able to get an exception, you could only get it by presenting a very good reason instead of just asking "why".
I suggest you to divide each of the two sides in four parts. So it would introduce an interesting dilema. Ally with the other players in my side to take the other side and then fight between us? Or be the first to unite my side and then take the disunited other side?
Anyway, your map gave me an interesting idea. There should be a way to define team starting positions through the XML.