When playing as Rook, it happens frequently to me that spawning a Tower is aborted. I know, or at least I think I know that this happens, when you try to spawn the tower in a too close proximity to other buildings (not counting other Rook towers). Though sometimes it seems to me, that this minimum distance is not very clear and thus hard to estimate. Therefore placing towers near other buildings can be a process of trial and error.
It get's really frustrating when it is aborted multiple times... e.g. I am attacking a tower or fortress, I try to place a tower somewhere by or behind me, to ensure it doesn't get aborted... but then.. aborted! Damn, I select to spawn a tower again, and place it a little bit more away from the other building.. aborted! Select again, move away more... aborted! Arrgl! :Þ These are a few wasted seconds where I did not do any damage to what I wanted to attack in the first place (apart from damage of the Rook's independent weapons, if I have any).
Anyway, to avoid this frustration, I would propose the following: the tower placing cursor should simply turn red for example, to indicate an impossible placement at that location.
On a related note: it would also be nice if the tower placement cursor showed the range of the tower. This would make tower placing more efficient and can also prevent aforementioned problem. But I guess some people will argue , that this would make it... "too easy" or "too efficient" or whatever.
