With the drops, the rise (rip Hattarene), and the ban (Warcriminal Arceus-Fire) then it's time to make some nominations
Drops
from S- to A/A- Palkia-O had been struggling a bit since it didn't really check Arceus-Fire despite using the water type slot. You'd think that the removal of it would help it, but now it has a lot of competition. Iron Bundle specifically is a problem, as it is a water type Palkia-O cannot check, while also being slower naturally (so you even lose to sets not using choice specs), while also having momentum in flip turn. It basically took it's job as a strong special attacker thanks to it's access to a more potent hydro pump and a better stab combination. It isn't the best special attacker in the tier anymore, and overall it lost a lot of offensive value. So i think that it's value comes defensively and trying to swap into common attackers like Chi-Yu and punishing switch ins with damage or thunder wave, rather than being an all out special attacker
from A+ to A. Still our best spinner, but it arguably struggles to check much in the tier. The best physical attackers rn are Zacian and chien Pao, both of which destroy it. While tusk can live one hit from them if they're unboosted, it struggles to do much against them without having access to SE moves. It's 4MSS is extremely bad, as you want Stealth rock, Earthquake, Knock off, Rapid spin, ice spinner (to deal with Landorus), body press/CC (to deal with Chien Pao and Arceus-Dark), etc.
From A to A-. Deoxys gets outclassed by Mewtwo, straight up. Being a mixed attacker only helps against stall but it makes you really vulnerable to getting swap stalled. It cannot kill Arceus-dark with a low kick or superpower, meaning part of it's strength is overall wasted. It's extreme speeds are not good enough to justify using a slot (they can't even kill a Chi-yu with max attack tera normal!) It has potential to be good but it requires innovation.
From A- to B+. This guy fell harder than that one time my brother fell from the stairs. Idk why but I'm never seeing him. Tbf it's extreme speed sets are vulnerable to cheap damage and usually will give up recover. It's flare blitzes don't do much to tusk, who's a huge thorn. Landorus-T also somewhat checks it. It's special sets are okay at best (Kind of outclassed by Arceus-Electric) and it's physical sets struggle to put a dent in the metagame.
from A- to B/B-. I have always thought this guy was overrated as a scarfer, and this is worse by the fact that it gets competition from Iron Bundle. Specs is it's best set in my opinion but that's not an A- set.
From B+ to B/B-. This guy sucks as a spiker. It's poor special defense means that it'll usually drop to a slight breeze and it makes it vulnerable to any swap in. It doesn't threaten enough damage to warrant being scared of it, and while the spikes can be annoying, you can rapid spin them away (since they'd need to be running Skarmory + Giratina which is a horrible team structure which would require another steel to handle ice types). It's a steel type that doesn't handle any of the ice types in the tier which can be really problematic.
from B- to C+/C. This guy kinda sucks. The fact that it's supposed to be a ghost type that breaks stall yet still manages to not really do that because of Arceus-Dark kind of makes him meaningless. He gets outclassed in HO by Spectrier, and in balance by Ghold or Giratina.
from C- to D. This is arguably the worst or the second worst Arceus form, only behind ice (Foreshadowing) . Overall, it struggles to find success and has yet to prove anything. I'm fine if I'm proven wrong though.
Rises
from A to A+. This guy is really good, especially now that Arceus-Fire is gone and it functions as a check to non-Sacred Sword Chien pao. Fantastic matchup into Arceus-Dark. It's fast enough and strong enough to where you always need to respect it. It does struggle into some Pokemon like toxapex or Mewtwo but i think the upside is worth it.
from B- to B/B+. Fantastic spinner and a great matchup into all the steel types, including Magearna, Solgaleo and Dialga. It does have a rough matchup into Giratina But it can cheap it down or have teammates that take advantage of it.
from C+ to B-. Fantastic scarfer and it has trick to cripple down even switch ins like Solgaleo or Magearna.
And here is the biggest nomination i want to make. Trust me, this is 100% serious
from D to B-. Yes, this is real. With Arceus-Fire out of the metagame I believe this guy has a chance to shine. It's great matchup into all the ground types (and especially Landorus-I) gives it great defensive utility for ground-weak teams. It's not perfect, of course. It requires spin support since it's ultra weak to hazards, and it can only hit the ground types with coverage like ice beam (so it'd get walled by steel types) or have to accept that it's not going to kill them in one hit (with flamethrower). It can still cripple steel switch-ins with thunder wave or will-o-wisp, set up rocks, and even CM. It has a good enough matchup into Mewtwo's without fire blast and Arceus-Dark.