Hot damn DLC came out and it def shakes some things up. Realize this will be likely be outdated very quickly but here are some initial thoughts I have on how DLC shakes up the meta.
In gen: new moves seem biased for terrain. And an actually good terrain setter in Rilla is out. Potential terrain abuse teams are back???
NFE/LC Pokes:

Its mustache isn't as good as Alakzam and its coverage is ass. No Focus Blast and the general lack of Hidden Power hurts.
But, 160 SpA, 145 speed, and Magic Guard are some great qualities.
It has gained Expanding Force. So could be scary on Psychic Terrain team.

Cinder has Libero and has kind of become the fire type version of Protean

. And its great.
But its Prevo is mostly better.
Stats are 65/126/100/95/100/134 vs 80/116/75/65/75/119. Alas, Raboot lacks Pyro Ball and Court change. But it has Flare Blitz+HJK+Sucker Punch+U-Turn for Libero coverage and Taunt for stall breaking.

Good lord the shrub has returned. No evio prevents it from being the God of Stall and no HP boosts sucks. Imagine 105/155/80 bulk.
But 65/155/80 is decent bulk to work with. Surprisingly has some punch to it with 95 atk, 140 spa, and 100 speed. Lose of HP hurts coverage and lacks its evolutions access to EQ so it doesn't work as an AV tank. But the physical defensive wall/pivot set should still be good.
PU:

:Mr.Mime-Galar: :Mr.Rime:
They have all dropped to the bowls of PU for the better. OG Mime has best def typing, best ability in filter, Mystical Fire coverage, and highest SpD.
Galar Mime has STAB ice moves, slightly faster, and slightly physical bulk than Mime.
Rime has the worst speed and abilities. But has Slack off, best overall bulk, and highest SpA.
Galar Mime and Rime are looking to be premier rapid spinners in TS. Especially since The Snowflake isn't back. Yet.
:Gourgeist-Super:

Man I wish Poltergeist was a special attack. Imagine what

or

could do with it.
Still beastly 110 BP Ghost move with not a huge condition to work on pokes with 140 or 150 atk. Would make Trevs and Dusks CB sets way better.
PUBL:

Dual Wingbeat is godly on this thing. Essentially a 120 BP Flying type move thats multi hit and only downside is 90% accuracy. "
Even with evio ban, Heavy Duty Boots help make up for its terrible life against SR. Can understand why Council decided on quick ban.
But like TI said, Scyther is PUBL so Its only +30 stats instead of 40. Really want to abuse this a little so maybe quick ban should be reconsidered?

Always sucked that it had to rely on STAB Shadow Punch for Ghost type STAB. But then GF gave it Poltergeist in addition to options like Heat Crash and Close Combat. While stats are worse then it was last gen, 154 atk STAB Poltergeist is worth considering.

Steel types beware, Magnets have returned to trap you. With it now being in PUBL, stats are way better than last gen.
50/90/125/150/100/100. Viability is mostly based on popularity of steel types in the meta. Also Meltan is outclassed.
NU:
:Acrtovish:
Its Draco version was sent to Ubers while I took a hiatus. Woah.

Yes terrains are worse, yes Indee is no Tapu.
But Expanding Force is awesome. When under Psychic terrain its BP goes to 120 pre STAB and terrain boost.
Pair that move with 125 SpA, and 115 speed, Psychic terrain teams have caught my attention.
NUBL:

While its risen to NUBL caused stats to go down, Triple Axel is a nutty move.
RU:

Even though Grassy Terrain is nerfed compared to last generations, Rilla getting Grassy Surge is amazing and its stats are > than its pre evolution.
100/145/110/80/90/115 vs 70/125/110/95/100/120. Its kind of like Tapu Bulk from last gen. Only not a fairy and has actual coverage to work with.
Thank you Ztest for pointing out this gets Grassy Glide. Rilla has priority while terrain is out. This thing is a monster.

I just saw Arena Trap has finally been banned from OU. RIP Dug. Its down to the depths of unviability with you. And Arena Trap in gen.
RUBL:
Flip Turn is 60 BP water type U-turn. And :Baraskewda: has 133 atk and 146 speed. Moving on.

For some reason Chansey is RUBL and Blissey is OU. Which means Blissey is slightly worse than it was last gen. Though it will probably be still quite good.
As for Chansey, the only stats it has thats better than Blissey is 5 more atk, def, and speed. With evio banned, just run Blissey.
If Chansey for some reason goes to RU, then its stats are 250/25/25/55/125/70. Then Chansey wouldn't be totally outclassed by Blissey but Blissey still has some advantages over chan in slightly more wish recovery and better special bulk.
UU:
Really surprised

is in UU given that its been OU since it first came out.
91/82/100/139/100/118 stats are really good. Especially now that it has Flip Turn for its choice sets. And Air Slash for coverage. I guess.

It fell to UU. And while toad is back its in OU. Rain teams are worth considering.