Really why laser towers still can be build on water? They are just a useless vs ships but we still have ability build them.Like 80% buildings can be build on land and water at this time. We need in more "difference"! Maybe add expensive anti-nuke ship instead "land" anti-nuke, just with less range.Add nuclear submarine (with range like 800) and remove ability build stationary nuke on water. Edit: I wait a moment when ubers add at last one pure hover unit in game.So you can remove "Moses" ability from Dox then.
http://en.wikipedia.org/wiki/Moses So you should find a liitle spot of land if you want build your laser tower SO much.
Players can't build this on lava and balance just fine there. We have tarrain features.Game even more interesting with it. If 1 player have better spots then 2 player... This is a problem of "map balancer".