I'm sorry but I don't understand the swapping thing? Why is it an exploit? from the way you described it, it sounds more like a surgical strike tactic. Have i just read it wrong?
As for exploits, it is very rare that an exploit comes along and is deemed unbeatable. It only usually occurs when a unit is 'broken' and as said before they get patched.
Game like this, you simply can't cheat on unless it's a modified map that everyone has to download (example, some one makes a new planet and has specific points on it that yeild over the top advantages when discovered, usually in a place only the mapmaker knows about) otherwise everyone would just have to have the same version in order for file changes to work.