First VR post from me, mainly focused on rises because there isn't much that feels too high.
RISES :
B+ -> A- : These Avalugg-H fat/balance teams are now very common and have a lot of variations. People realized just how many good matchups against common setters this mon has (excellent against bomb and aslash, pretty good against rhydon and muds, okay into the qwilfishes if you can afford being statused). It's certainly a tera hog but it's not like it's useless if you don't tera. It's also decently hard to switch into for more offensive teams. It can be a bit passive against the likes of milo/heatom, which is why it tends to work only on more defensive structures. So it's archetype limited and is still flawed on the special side which prevents it from rising higher imo, but the fact it can be the ultimate stopgap to physical attackers after tera is very appreciated.
C+ -> B-/B : Glowbro leaving created a need for status absorbers, and this mon is very good at that while being somewhat dangerous. Sure, relying on rest sucks, but it's a very cool sidegrade to coil dudun if you want something to deal with toxic users like amoong/goodra/lazzle, all of which can feel hard to take into account on the builder. Thick fat is not bad either, if you're scared of frosmoth for example. Eq as coverage is kinda new and works great if you managed to knock off rhydon's item.
A- -> A/A+ : Bruxish is so much better after shifts as we all know, scarf is one of the best speed controls and kinda hard to switch into, but what I wanna highlight is band and sd being played a lot more now. And for good reasons, this mon is not easy to answer at all.
A -> A+ : This mon has always been crazy good, but now it has even more set variation, with things like cm+toxic, offensive rocks with boomburst + chople, glare + hex, etc. being more explored. It's so hard to play around while being a good fit defensively, blanket checking many things by virtue of its good bulk.
A -> A+ : Slowly proving to be best dark. While I don't use it much, I cannot deny how much it can provide for a team. Spedef pivot is now staple but offensive sets are still great progress makers, with scarf rocky payload being another good trendy set. Set variety and role compression makes it so good and it's reflected by crazy usage in PUWC rn.
A- -> A : Snow staple and best removal in the tier while being a decent steel type and progress maker, this mon should have been higher in the first place. It has flaws, that's for sure, but it's a balance/BO staple.
B- -> B : It might be more opinion based but this mon is a pretty good scarfer, despite poor matchups into things like goodra rotom-heat and amoong, which you can trick sometimes so it's not the end of the world. Ground immunity, good milo matchup, "unblockable" pivoting, tricking scarf into opposite wincons, I don't really know why it's so low honestly. It's for sure better than the rest of B-. It's at least on par with h-trode if not better.
B- -> B : I already talked a bit about this potentially being a big winner of last shifts, and sets like life orb mixed with leaf storm or trailblaze sd (sometimes with tera blast ghost) are genuinely good. There's also more room for coverage like zen headbutt now. Overall a good mon with surprising damage output for how bulky and fast it is.
C -> C+/B- : Somewhat huge rise and honestly I can't really explain why this mon improved. Like, wo-chien leaving sure, but you could already flip turn. What I know for sure is that this mon is seen quite a bit, it's pretty good at forcing passive answers and pivoting into them for other threats to abuse. Maybe the last drop was just too harsh.
DROPS :
A+ -> A/A- : I might be alone on this one but I feel like this mon is not that great (despite me being one of the ban voters). Offensive sets are way too reliant on tera, each tera having hardstops, it's bulky and fast but not that bulky and not that fast, we don't see it that much now. And sure it's a great enabler in snow, but does snow alone justify it being so high? Idk about that. Snow can be a bit centralizing and steals wins with frosmoth, but it doesn't make a9 A+ by any means, at least for me.
A -> A- : Still a good mon but it fell off a bit. It's susceptible to knock off from the more prevalent bombirdier, it's a bit passive for the more offensively oriented meta, it gets abused by slash in snow, not a great spedef wall in this lazzle/frosmoth/cm florges/rotom-heat economy.. But it obviously still has tools to be good, barb barrage is hard to switch into and it keeps a good matchup into the otherwise scary hoopa/bruxish.