Yeah it's a technicality thing. You can only talk about stuff that's currently in A+ or S. Shame, cause Sableye/Latias need to go up pronto.
Anyway, idk how controversial these changes are, but I'll say them anyway. I think Clefable and Azu should drop to A. Both are still good mons, with Azu still being a power house and clefable a nice mixed wall or setup sweeper. However, neither are capable of checking Greninja anymore, and that was a huge reason they were so good originally. Clefable checks Mega Sableye well, so it isn't bad by any means, but it just isn't as good as other mons that deserve A+.
Similarly, I actually kinda think Landorus needs to drop. It isn't bad, but there are two big things going against it. First, Mega Latias is insanely good, and checks Landorus much better than Latias ever did, thanks to the insane defense increase + the Knock Off damage reduction. However, the main reason I think it should drop is its opportunity cost. Scarf Landorus-T is insanely good atm, and a lot of people are hard-pressed not to include it on their offensive teams, sadly leaving no room for Landorus-I. It also suffers from the big speed creep of oRaS; previously 101 was enough to outspeed the big wallbreakers (Garde, Medi, Hera), but now, there are much faster wallbreakers that landorus can't hope to outspeed (lopunny, gallade, metagross, etc). I know Landorus' speed was never a huge asset, and that it was never spectacular against offense, but it's a lot worse against it now. It has the potential to adapt with Rock Polish sets, but I still don't see them being great, since it limits your coverage, and still stops you from using one of the best mons in the tier.
Mew also needs to drop imo. Its claim to fame was as a mon that annihilated stall, but now with Mega Sableye, it can't hope to be as effective. I've also been seeing more Mega Houndoom lately, which is another hard Mew stop. There's also Camerupt, which counters Mew amazingly. Mew does appreciate the lowered influence of Charizard on the metagame, but I don't think the metagame shift was in its favor, and that A or A- is more appropriate, depending on how much usage Sableye gets (btw plz move it up already).
Speaking of the Charizards, I think X needs to drop as well. There's almost no reason to use Charizard-X as a Dragon Dancer because of MegaMence, which relegates its only real role to StallZard, which is a good set, but certainly not worth S. Pinsir also is a lot worse with Mega Mence in the tier - I'd honestly never use it. Not sure of its ranking atm - it'll move back up eventually, but atm I don't think its really good.