Please tell me at least some of this is sarcastic. It's fine if you think Mega Bro was underwhelming because that's just an opinion. I can't fault you for that, but there's a few things I'd like to point out about your posts that are incorrect.
First, Mega Metagross isn't legal, so there's no way you can claim it has or has not helped you against Fairy teams unless you're referring to before it was banned, which was far too long ago for it to be relevant in the current metagame. And if it was legal, I can guarantee that Fairy would hate Mega Meta just as much as Mega Scizor.
Second, "Cro" sets are literally any pokemon that runs Rest/Talk/boosting move (usually CM)/attacking move. Suicune was just the original user of the set. It doesn't matter what pokemon runs it as long as it has the same general moveset, so Crobro is an accurate title for the set.
Last, this isn't so much a fact as it is an opinion, but Victini and Jirachi have enough physical power for Psychic. Mega Gallade and Medicham are great, but they're not mandatory and Psychic could certainly find a place for Mega Slowbro.
As for the discussion on unbanning Mega Slowbro, I'm not going to take it seriously unless someone makes a post clearly explaining why it should be unbanned. As of this moment, I see no reason to consider it. Those of you that want it unbanned, please give us a reason to take this suggestion seriously.