I COULD BE BANNED!
I'll have to oppose this one. Agreed that Xern still has a lot of sets, but you still wouldn't look at one particular set with the same approval as it got in gen 6. While I understand that need not be a benchmark for its current viability, there are far too many factors to hinder it. The meta is loaded with Xerneas checks to the extent that you don't really have to 'pack one', you just find yourself dealing with Xerneas by using some of the most viable mons in the game. Most of these mons aren't solely Xern checks either; Primal Groudon, Magearna, Solgaleo, Chansey, Blissey, Ho oh, Clefable etc are very viable aside from checking Xern, whereas Poisonceus, Fireceus, Aegislash (sorry for even mentioning this, but it's true), Amoonguss, Shedinja, Mega Scizor, Megagross etc can be packed specifically with the purpose of countering Xern. Not to mention, the bunch of mons that can check Xerneas on the absence of a move or two like Ferrothorn (if hp ground is user over fmiss), Steelceus (if xern isn't ev'd to tank judgment or hp ground > fmiss), scarf Jirachi (in case it creeps Xern), Celesteela (no thunder xern) etc. I mean sure, Xerneas could pack specs or band and surprise some of these mons, or could set up on pseudo-hazers with ingrain geo, and that's why it still is A- rank. But you just couldn't point out to one Xerneas set with 4 definite moves which beats even half of its checks. There's just so much the meta can do to deal with Xern now, and its previous ability to use scarf xern for some very exclusive perks is gone. I'm not saying it needs to drop, but there just hasn't been anything spectacular recently which inspires a jump. It has dropped quite a lot in usage, and if it ever gains the usage back, its checks will come back and hinder its success again. It just seems like a very A- mon, and I think a push is severely undeserved at this point of time.