Balance or not, undocumented changes aren't good. TW has done this many times since the beta. Even if the change is desired by the community, randomly changing stuff silently while there are people trying to play tournaments is a pain in the ass. I mean I don't need to say it at this point, but BL will never ever be a serious competitive game, and this is one of the hundreds of reasons why.
It was the best choice to abandon that happening long, long ago.