Guys, it's very simple, just count the teams on Platinum arena which don't have Tormin. Do you know how many currently teams don't use it?
10 from 300 ! Is it balanced for you? I don't think so. Having such "must have" heroes in the game will just ruin it in the long term, so it's normal that Plarium fixes this imbalance.
I can understand the feeling of injustice when you invested so much (money or time and effort) and after all you get the notification that you wont get what you expected... everyone makes mistakes and delivering such strong hero quick without more tests was one of it, i think.
In any case the best they can do now is to fix this error and apologize - that's exactly what they are doing, right? May be they do it not good enough, but this is another subject.