Like the last time we had a survey, I'd like to share my thoughts on the Pokémon in question.
How do you feel about Cinderace?
I gave it a 4 out 5 rating. The combination of it's speed, attack, movepool, ability and Heavy-Duty Boots boost it to the top and make it a force to reckon with. It has very few checks and it can take advantage of them via its moves. U-Turn can be easily spammed against Toxapex and Slowbro and provide momentum. Of course Rocky Helmet and Rough Skin Garchomp punish this idea, however from that point onward, Cinderace doesn't have to use U-Turn.
Gunk Shot can potentially screw up Slowbro, Toxapex can be 1v1 when it packs Zen Headbutt and Garchomp has no recovery and is forced to rest. You could argue that it has a 4MSS, since it needs to run Pyro Ball and U-Turn. From there on it has to decide between Gunk Shot (for fairies and poison on Slowbro), High Jump Kick (for Blissey and Tyranitar), Zen Headbutt (for Toxapex) and Sucker Punch (for faster Pokémon). Electro Ball is also something that can consider putting on your Cinderace since it can screw up its water type checks, which can even be boosted by Electric Terrain provided by a great teammate in Tapu Koko.
Speaking of which, it's true that it has a 4MSS, but it teammates can help it to deal with it. Spikes can help with Toxapex and so does Future Sight. As mentioned Koko can help it with its Water type checks and Garchomp can deal with bulky Pokémon that weak to ground while Cinderace can help it to deal with Skarmory, Corviknight and the fairies.
While many people would like to have a Magearna suspect, I would say that Cinderace is more of a thread and more restricting. Cinder doesn't have the immediate power of Magearna, but it is faster and can deal with faster Pokémon without set up. Life Orb sets give Cinderace more power, but being honest LO Cinderace sucks. You looses longevity due to its Stealth Rock weakness and Life Orb chip, while Rocky Helmet and Rough just reduce your chances of getting in. Heavy-Duty Boots are just better and on more reason, why it is difficult to deal with.
How do you feel about Magearna?
While I said that Cinderace is more restricting, doesn't mean that Magearna is less of a threat. It has a great typing, stats and ability with a very wide movepool. You don't know what set it runs, until one of your Pokémon is severely damaged or KOed. Choice Specs, Choice Scarf, Shift Gear, Calm Mind sets and many more are difficult to deal with since you don't what Pokémon of your team can check it.
Ground types can deal with it, but when it Shift Gears on the Switch or has already set up it can just Ice Beam your Nidoking, Garchomp or Landorus-Therian, while something like Swampert who isn't weak to Ice can dealt with via Fleur Cannon. Heatran resists it's Stabs and has the bulk to tank its other moves, assuming it doesn't have Aura Sphere or Focus Blast. Toxapex can clear its boosts with Haze, but when Magearna is running Thunderbolt, it is lights out.
When provided with status, hazards or screens support, it can steamroll through teams without much effort. One lucky turn, prediction or otherwise a free turn can immediatly make the game a downhill battle. There is some counterplay though, Latios can prevent it from switching in, because of Mystical Fire, while the many U-Turn, Volt Switch, Flip Turn and Teleport users can bring in a Ground or Fire type against it, so they can take advantage of a Magearna that doesn't set up yet and is probably slower. I still think think that we should consider it for a suspect, but I think Cinderace should be our top priority right now. 4 out of 5 ranking.
How do you feel about Toxapex? 2 Not Broken
Toxapex isn't as much of an annoyance as it was in DLC1. There are Pokémon that can easily take advantage of it and there's some counterplay to it. Cinderace, Magearna, Volcarona are potentially Pokémon that it can check and beat however they have moves to threaten Toxapex with or they can take advantage of it via U-Turn and Volt Switch. Strong Ground types like Garchomp, Landorus-T, Nidoking and strong Electric types like Tapu Koko and Zapdos are common, useful and beat Toxapex or they can set up, lay Stealth Rock, pivot or dent the opponents other Pokémon. The presence of psychics like Tapu Lele, Slowking-G, Slowbro and Latios doesn't help much.
It's still a great Pokémon, don't get me wrong. It has great bulk, Regenerator and fantastic moves in Haze, Knock Off, Scald, Toxic and much more. It isn't the splashable wall, it's used to be. I gave it a 2 out of 5 Ranking.
How do you feel about Tornadus-T?
I gave it a 1 rating, but after some games I would consider givint it a 2 rating. Tornadus-T doesn't have Roost like the other birds, but thanks to HDB and Regenerator it can stay healthy throughout a game. Its speed and utility options in Defog, U-Turn, Taunt and Knock Off make a solid Pokémon that's worth to take account for. Nasty Plot is a scary set, however the problem is that you have to rely on inaccurate moves to deal damage, but it gets the job done. It's speed makes it fantastic too. It pairs really well with other Regenerators like Slowking-Galar, Slowbro and Toxapex. I can see how it might be frustrating, but I'm not convinced that it is broken or restrictive. My opinion might change in the future, but that's how I feel for Tornadus-T right now.

How do you feel about Teleport? 3 Not Sure
I would give it a 3 out of 5. Teleport isn't broken per se, but the main abusers of it make it frustrating to deal with. Slowbro checks a few physical attackers and with Regenerator, it can heal of the damage, while getting a Pokémon like Cinderace in safely. Blissey checks almost all special attackers reliably and it can spread status, set-up Stealth Rock or it can just Teleport out of battle. Clefable can Teleport into a teammate and heal it with Wish, but I'm not sure if it is that good right now. Overall, I think that Teleport that is worth looking at, but not now.
Should we consider unbanning Zamazenta-C?
Last Survey I gave it a 5 rating, meaning I think that it should absolutely be considered for a test, but now I gave it a 3 rating. After thinking for a while, it doesn't feel right to unleash it for OU yet. After some time where the Meta has stabilised, we could consider testing it. I look forward for it in the future.
Should we consider unbanning Darmanitan-G?
1 out of 5, absolutely not. It basically has Choice Scarf and Choice Band equip or with a CB it has a nuclear attack stat. With this Pokémon every battle becomes a prediction play, but even if you resist its attack, it still leaves devastating damage. Plus it has U-Turn which is really spammable. Sure it has a Stealth Rock weakness, but there are reliable ways to get rid of them and starting at 76% health doesn't matter when it's a late game scenario where you can just stay in and click one move. Rotom-Wash and Rotom-Heat resist all of its attacks (assuming you take the standard set before it was banned: Icicle Crash, Flare Blitz, Earthquake, U-Turn), but those two have no reliable recovery and aren't very good in the current meta to begin with. I don't see it being balanced or unbanned at all.
Should we consider unbanning Zygarde?
I gave Zygarde a 2 out of 5, because it isn't has bad as Galarian Darmanitan, but still no. It has great typing, great bulk, a riskless and spamable Stab, two great set up options in Dragon Dance and Coil, Substitute and Glare. Those attributes make Zygarde a very unhealthy and annoying presence. Necessitating checks/counters like Clefable and Buzzwole is restricting. Maybe sometimes in the future won't be that obressive, but I can't see it being unbanned in the near future or at all.
So, here are my thoughts on the questions, I think once Cinderace and Magearna leave the tier, the meta game will be in a much more healthier spot. From their on we'll have to see how the meta develops and look some threats that might become obressive or restricting.
Anyways, have a nice day and stay safe.
Cya!