Hello, I figured I'd explain my votes. I will order the subjects from most problematic to least problematic in my eyes.
My ban votes:
Magearna should be clear. Setup sets with Calm Mind + Shift Gear/Iron Defense + Stored Power + Draining Kiss have a very limited range of checks, have proven to be too much when you add in Dual Screens, Weakness Policy, and Tera, and can easily snowball out of control. If that's not enough, it can catch you off guard with an absurdly wide array of other devastating sets to boot, ranging from Choice Specs to Spikes.
Chien-Pao was banned with a suspect test earlier this generation and remains tremendously strong. I voted to drop it back into the tier with the idea that Pokemon like Zamazenta (both forms), Magearna, and Urshifu and a higher general power level would help combat it. However, while they help to a certain degree, Chien-Pao's damage output just remains too much. For instance, Choice Band + Tera Dark Crunch 2HKOs Magearna, Urshifu, and the vast majority of the rest of the metagame. It helps that Sacred Sword allows it to cleave past Zamazenta's Defense boost, while priority options in Ice Shard and Sucker Punch make it a strong revenge killer on top of an oppressive wallbreaker.
My do not ban votes:
While I agree that some of these Pokemon have problematic elements, mainly the Iron Defense Zamazenta sets sweeping ill-prepared teams and Dire Claw cheesing past Sneasler's checks, in my personal opinion not quite enough time has passed to confidently say these Pokemon are outright broken. Frankly, I think people that argue that most of these should have been blatant quickbans in this slate are kneejerking too hard, similar to Walking Wake's first couple days in the tier. Hypothetically speaking from hindsight, I'd rather have kept a broken Pokemon in the tier a couple days longer than have wrongfully quickbanned a balanced Pokemon. It has been a mere five days, two quickbans have taken place since release (though I do personally wish it were three) and I would like to give these Pokemon a couple more days in this fresh metagame before I reassess their place in it and adjust my vote accordingly in the next quickban slate that will take place this upcoming week.
As for Light Clay, I believe the fact that it's on the radar is a symptom of certain Pokemon being broken, like Magearna, rather than the item itself.