I think I speak for a lot of CC spec classes out there when I say that the tower zones need more areas that block LOS. If I bring a knife to a gun fight, I definitely want something to hide behind so I don't get shot, or at least have a better chance of not getting shot. I'm sure a lot of nanomages would like this idea too. I just have no idea how hard it would be to implement, but it seems kinda strange that you can build towers but can't put up walls to help defend em. And afaik the towers don't block LOS either.