Over? Not exactly. The hole has been plugged but there's still a hole in the ship.
Which hole is still there, I don't follow you? If you think protocol should be changed to sign the TxID that will not happen for many reasons, they were explained earlier. This fix removes the possibility your new transactions being rejected because of malleability, so there's 0 chance regular users will be again effected by this issue. When and if will MtGox fix their own implementation is their own problem, they are rapidly becoming irrelevant.