Personally, I've always felt that Johnny was the only member of FF not worthy of being an Avenger. But I'd be just as happy if he were still dead. Unless they're going to continue having Sue be his surrogate mommy or getting in immature fights with Ben, he really doesn't have much use.
I agree that Johnny is pretty much a waste of space and has been for a long, long time. Writers and editors seemed to have given up any attempt to make him grow up and I desperately miss those good ole' days when John Byrne actually matured him somewhat. Even Mark Waid's run suffered because Johnny seemed more immature than ever.