While I don't have a strong opinion on Mega-Sableye (which I don't really use) in regards to it I can leave only a note or two about how I've dealt with it in the past: Unaware Clefable. That said, there definitely doesn't seem to be a wealth of options to swiftly beat Mega-Sableye and while I have no strong feelings for or against its ban I can understand why it would be banned.
With Shadow Tag, I say ban Gothitelle. Even back in XY this thing was scary, Specs Gothitelle can trap and kill Mega Venusaur and then trick its item (usually to a Chansey). With the rise of Mega-Sableye stall, Scarfed Gothitelle definitely got a lot more viable with its ability to trap and destroy stall breakers. Thanks to its wide movepool and ability to cripple all none mega Pokemon with Trick its a huge support to Mega Sableye stall. A well played Gothitelle can win its player the game by trapping and destroying the choice Pokemon that threaten its player's team. I feel that, more than anything, Gothitelle has taken advantage of the metagame changes between XY and ORAS to drastically increase its viability and overall threat level in team match ups.
I guess my personal opinion would be to remove Gothitelle from the meta before removing Mega Sableye to see if Mega Sableye stall becomes more or less manageable.
With Shadow Tag, I say ban Gothitelle. Even back in XY this thing was scary, Specs Gothitelle can trap and kill Mega Venusaur and then trick its item (usually to a Chansey). With the rise of Mega-Sableye stall, Scarfed Gothitelle definitely got a lot more viable with its ability to trap and destroy stall breakers. Thanks to its wide movepool and ability to cripple all none mega Pokemon with Trick its a huge support to Mega Sableye stall. A well played Gothitelle can win its player the game by trapping and destroying the choice Pokemon that threaten its player's team. I feel that, more than anything, Gothitelle has taken advantage of the metagame changes between XY and ORAS to drastically increase its viability and overall threat level in team match ups.
I guess my personal opinion would be to remove Gothitelle from the meta before removing Mega Sableye to see if Mega Sableye stall becomes more or less manageable.