^Talonflame is nowhere near as meta-defining as Aegislash, and has a much harder time switching in to them.
The issue isn't that these megas will be impossible to handle; they're all not so hard to RK, after all. The issue is that without their #1 check, their usage will rise and stall will have to face them more often, so stall becomes less viable.
I don't find it a compelling argument though; I don't think their usage will absolutely skyrocket. Their match-up vs. offense is pretty bad, most teams will still be better off running the better megas and handling stall in a different way. Most stall teams have always been weak to one or more of these three, and it's not like Garde and Cham aren't OU.
Also if Mega Maw and X-zard happen to get banned you'll be grateful that these stallbreakers are more viable
The issue isn't that these megas will be impossible to handle; they're all not so hard to RK, after all. The issue is that without their #1 check, their usage will rise and stall will have to face them more often, so stall becomes less viable.
I don't find it a compelling argument though; I don't think their usage will absolutely skyrocket. Their match-up vs. offense is pretty bad, most teams will still be better off running the better megas and handling stall in a different way. Most stall teams have always been weak to one or more of these three, and it's not like Garde and Cham aren't OU.
Also if Mega Maw and X-zard happen to get banned you'll be grateful that these stallbreakers are more viable