Hello I am here to make a few (somewhat preemptive) viability noms. (No pictures sorry I'm cheap)
Camerupt-Mega UR -> 1.5: I think that all of us can agree that this is a fantastic mon. It is the fastest thing under the sun when Trick Room is up, It has very powerful spread moves, and it beats everything in tier 1 except Mega-Blast, with it's tier 1.5 and tier 2 match-ups being fantastic as well. Most of the things it can't beat are easily checked by other common mons (Tangela, Hariyama, etc.) Its only problems are that it has a terrible time outside of TR, and water is a really good type right now in the meta.
Chandelure UR -> 2: Being a TR setter with an immunity to fake out rocks, and it has other useful immunities as well in Normal, Fighting, and Fire courtesy of its ability. Fire Blast and Shadow Ball coming from 145 base special attack hit things very hard and Chandy has useful luring options in moves like Will-o-Wisp, Energy Ball, and Hidden Power Fighting. It does have some problems though, as it is pretty much hard-stopped by Diancie and has to compete for a team slot with Hoopa. Its speed tier is also a little awkward though, as it gets put to sleep by Rose (which outspeeds it) and Hoopa outspeeds it when TR is up. Nevertheless a good mon though.
Porygon2 UR -> 1.5: Porygon2 is a TR setter that is incredibly bulky while not being a sitting duck thanks to download and 105 base special attack. Its moveslots can be tailored to hit whatever you need to with it thanks to its great coverage. It also has Recover to ensure that it can set-up TR again and again. Its only real problems are that it has no sitrus recovery as well as its weakness to knock off. Fighting types are also a problem for it, but there are plenty of good fighting resists in this meta so it's manageable.
Thundurus-T UR -> 2: It is a slower, but much more powerful Raikou with better coverage. It does suffer from a rock weakness though, but it can alleviate that with Flash Cannon or Grass Knot. A Ground immunity is also nice. It sits at a nice speed tier where it outspeeds the base one hundreds, and it can hit most of them with its powerful thunderbolts. Also this mon is legal, I've used it on the ladder.
Volcarona Tier 1 -> 1.5: This has a harder time in the new meta, Chandy and Camel just wall it while the waters the new mons being used to check them also check Volc, also needs much more support than anything in tier 1. Drop it imo.
Abomasnow-Mega Tier 1.5 -> 2 or 2.5: We have 2 new fires, one of which is a better TR abuser than it is. Plus was hail really ever that good anyway.
Hoopa Tier 1.5 -> 2: This now has major competition in Chandelure as an offensive ghost type that can use TR. It is (arguably) the better abuser thanks to Hyperspace Hole, but it has the physical bulk of a wet paper bag, and Fire is a better Stab than Psychic is. This is definitely on the same level as Chandy, but I would never put one over the other.
Gastrodon Tier 2 -> 1.5: The meta is now really in favor of glop glop, Camel and Chand are both fantastic partners for it since they remove Tangela easily. It also has an easy time getting past Camel + redirector thanks to Muddy Water hitting both sides.
Magnezone Tier 2 -> 3: Thundy-T just kind of, outclasses it. Not to mention that being an electric weak to fires isn't fun.
Roserade Tier 2 -> 2.5: This had a terribly low win rate in the duu tournament, plus there are 2 new fire types that, while it can sleep it, it has to run timid to ensure it isn't just Fire Blasted. Plus many of the things it beat (bar waters) are going down in usage.
Aromatisse Tier 4 -> UR: This is bad, it is outclassed by every other tr setter, and we just got 2 more.
Escavalier Tier 4 -> UR: See above, just replace TR setter with TR attacker. Plus fire's exist.