I think that Ice should make another Delta Seige-style map, except a bit "fatter", so the "land" portion is wider, and there are two paths to take to get to the enemy base.
And don't say "Then just play Duo!", because the problem I think there is with DeltaSeige is that, if you lose the water battle, then your team LOSES... HARD. A single Cruise Missile ship can take the middle hill out, and can take out a number of metal patches and places for fortifications with EXTREME ease. And on Duo, that's just doubly so, if you take an ocean, then your team can pour through on one side, unimpeded after your preparatory barrage.
I propose that, with more land, there is still a chance to win, or at least not be TOTALLY screwed if you lose the water war.
I'm saying this as an avid naval player.

(Just FYI, I play AA.)