I understand your reason, but it doesn't seem to be a huge game-breaking problem. It depends on your point of view as well, since using alternative tactics that are at the player's disposal may be considered skill of a different kind. However, iClassic has never been a game that any type of alternative strategy is particularly useful, so I can see where you're coming from. That is something I don't like about towers, since it's always the same and never allows for variety in how you take them.