Ubers Holding Stones
MnM needs to set much more clear standards to decide which Ubers Pokemon are and are not allowed to hold Mega Stones than the very arbitrary system already in place.
Currently, the MnM leadership has more-or-less cherry picked which Ubers to unban. Marshadow for example, was allowed despite its well noted perfect STAB combo, access to one of the more broken moves in the game, STAB Priority, fast speed, and high attack. Remember when Arceus-Ghost was one of the best mons in MnM? Lol same but then Marshadow happened. Hopefully, Marshadow will be banned in this suspect but it exemplifies the problems with cherry-picking unbans.
To further this, why are Deo-D and Deo-S allowed? Deo-S is at least guaranteed rocks, likely a set of spikes, and is the fastest taunt in the game. This set was allowed in AAA for some reason last gen, and I can personally speak to how powerful it is, do
not underestimate how powerful guaranteed hazards are. On top of this, Pidgeotite Deo-S has Zap Cannon, Focus Blast, Blizzard, and Nasty Plot. Nasty Plot even tears through Blissey, and we all know how powerful/annoying Zap Cannon spam can be.
Then Deo-D is allowed. There was a push to ban Cresselia, but no push for DeoD. Yes Cresselia gets Calm Mind, but DeoD gets Cosmic Power, Recover, Taunt, and even better defenses. With Sablenite, DeoD can be damn hard to break.
What about Darkrai? The arguments I've seen against Darkrai is sleep spam, but we have Gengar and that hasn't been a problem due to all of the Magic Bounce in the meta. Is Darkrai that much stronger than Gengar that it should be banned but Gengar shouldn't? Why? How is this decided?
I can keep going. Is Zekrom that broken? Isn't Tapu Koko even stronger than Zekrom with Electric Terrain, and it is also faster? Why is Zekrom banned but Koko isn't? Is Reshiram really better than Volcarona? Volcarona gets Quiver Dance. By the arbitrary standard we currently have, I really think I could justify Zekrom and Reshiram being unban worthy. (Obviously the answer to my rhetorical questions are bc those 2 are Ubers - esteemed council "guaranteed win" IT11 even said he could theoretically see these two being unbanned, my point is this logic isn't used universally across the meta).
I'm not advocating to unban all of these, my own opinion is quite different (Marshadow should be banned, DeoS should be banned, DeoD should be banned). I am advocating that the MnM leadership outline how these decisions should be made in a way that is different then "DeoS has lower stats so unban, but Darkrai can sleep so ban!"
Clearly it is too late to start in what I consider the right way (all ubers banned and try each one individually), but something should be done.