That is in no way a "hack" by the common definition of it. It is not even an "exploit". If you want to complain about it, a better word would be "unbalanced".
Your suggested nerf is a bit big. If Teleport has to be nerfed, you could increase the AP cost of it to 3-4 so that you can teleport a target, but that's basically all you can do on your turn.
