Imagine a water war where there were more tools at your disposal....
Perhaps airstrikes: http://www.youtube.com/watch?v=4Tl-8Tp00OI&feature=related
Perhaps armoured cars: http://www.youtube.com/watch?v=dIliL7nTr7U
Perhaps a lot of other tactical elements that we haven't seen in any way yet, such as armed guard towers, Underslung Balloon Launchers (UBL's) for our Blasters, Fan-Spray blasters that produce so much aqua mist at a good range that they're like flamethrowers, true sniper soakers, and traps!
Anyway, post your own ideas for awesomer (fake word?) water warfare.