Let's about the bunny and the dog in the room.
My opinion on Cinderace hasn't changed at all. I still think it's too much for OU atm. It's really strong and really fast with STAB on every move and some nice flexibility in Bulk Up and coverage, like Zen Headbutt, Electro Ball and Gunk Shot. It does have some kind of 4MSS, but even if it doesn't have the one move against Check A, it can at least 1v1 Check B. Also this Pokémon is easy to pair with Pokémon that can beat its checks.
Tapu Koko helps out against Waters like Toxapex, Slowbro and Tapu Fini with the added bonus of having a Voltturn core, while Urshifu-R removes the need for HJK while overwhelming Slowbro and Toxapex, espescially since Cinderace doesn't need HJK necessarily and can run Electro Ball or Zen Headbutt instead.
I don't think it has a place atm, but we could potantially get there.
When Cinderace is too much atm, then Zama-C is too much for eternity. This thing may have flaws that make it look balanced, but its good traits make up for them. Reasons you've heard before, but 130 Atk is really fucking good even without a boosting item. Do you know how much damage Cinderace does with a STAB 70 BP move and 116 Atk? Now imagine that but with 130 Atk and CC. Admittingly, this isn't a fair comparison, but it should give you an idea of how strong this is. Also just because Toxapex can check it, doesn't mean it's manageable. Many Pokémon are checked by Toxapex, but that doesn't make them bad and you can play around it.
It's also very bulky. I don't care if it doesn't have recovery. Garchomp, Landorus-T, Dragapult and many others don't have it either, but they are still reliable hit takers and damage dealers. Also, there is stuff like WishPort, Healing Wish and a tiny little ability that is really common, which is called Grassy Surge. You know, the ability that is effectively Leftovers and a removal to an Earthquake weakness. Sure, those strategies aren't flawless and you can play aroung them and prevent them from happening, but even if you don't pull a WishPort off, Zama-C is still bulkier than Pex (and we all now how frustrating it can be in a 1v1) with a 4x Stealth Rocks weakness.
Last but not least, it's really fast. Like, faster than Tornadus-Therian, which is already considered fast and it is only outsped by Tapu Koko, Dragapult, Zeraora and Regieleki. Which means that it can threaten out fast offensive Pokémon that happend to be slower than it.
Now, I have to be fair and speak about the drawbacks those two have.
Cinderace, as mentioned, has a bit of a 4MSS, which can really bite it when it gets walled by a Pokémon, that you have to chance to kill. It's frailty also plays a huge part and it is sometimes frustrating to get it in safetly.
Like I said, I don't think its lack of recovery is enough reason to unban it, but it really sucks that it can't even run Leftovers. Also, I might have overreacted on calling 130 Atk a good attack stat, and yeah I still think that, but it misses out on a few KOes which is frustrating. Also it's movepool isn't so hot either. I think the best sets would have something like STABs, Wild Charge and Ice Fang. The two latter moves are garbage. Wild Charge makes it bulk worse and Ice Fang doesn't work well with its attacking prowess.
Last thing I want to mention, is the Metagame. Last time I talked about Zama-C (in my dumb rushed 50 words or so post), I talked about how it would ruin the balance of the metagame it has and the fact that I completely forgot about is that a balanced metagame is more of a reason to test something.
TL;DR
Cinderace is too much for OU atm, giving its power, speed and versatiliy, while Zama-C is just ridiculous. Those two have their drawbacks, but I think the good traits outshine the flaws.
Eventhough, I don't like either test suspects, I wouldn't mind having a suspect, giving the state of the meta we are currently in. Also getting reqs for once and voting on stuff, could be nice.
I'm not very fond of that idea, but a part of me wants to see OU burn, so let's do a test. I might be wrong and that would teach me a leason on not being so pessimistic on topics like this.
Let's go for it