Alright, with those first two quick bans out of the way, one reasonable and the other more debatable, I think I can better sort my thoughts into "quickban versus proper suspect vote", in order of immediacy and in turn how I think they'd affect the meta:
Chien-Pao: Quick Ban. Even without two of the most prominent Ghosts, I consider this thing to be too detrimental to more bulky or defensive builds by way of its ability. On top of that, its speed with Flutter Mane gone now makes it the fastest thing short of Dragapult and boosted Pokemon, both of which it threatens with priority.
Terastalizing: Suspect. Much like Dynamax, I think it's reasonable for a generation's gimmick to be more controversial. Adding to that is the fact that I don't think it's an auto-win button, even when done defensively. I think a lot of offensive Pokemon that are defensively Terastalizing still ultimately come with tradeoffs for their new typing. Still, it's a vote I'd probably lean towards ban in.
Roaring Moon: Quick Ban. Now this may seem surprising with how I consider Roaring Moon underwhelming at the present, but I think with Flutter Man and Chien-Pao gone this thing is gonna shoot way up in terms of effectiveness. If Terastilizing stays, both Booster Energy Acrobatics and Tera Steel Iron Head are incredibly dangerous. If Terastilizing goes, there may be more of an argument to just suspect it. However, I consider Sun with Roaring Moon to be super good, and by the nature of Sun it beats down the Ice-types who should be benefiting from the Hail changes. I don't think this Pokemon has been broken initially, but it's fast gonna become top-tier.
Palafin: Quick Ban. This thing is strong, no doubt about it. I don't think it's the absolute strongest of the new Pokemon, but much like Chien-Pao, it limits way too many of the usual defensive options, especially the few I consider to have any defensive viability. Pure Water, even without Terastilizing, makes it easy for this to set up against any of them, and it has strong coverage to deal with those that might check it. It does have counters, unlike the rest of this list, but it's a short list of counters: Amoonguss and Meowscarada being the only ones that come to mind.
Cyclizar/Shed Tail: Suspect. I've seen a lot of discourse between the two of these, and I don't disagree. With the above three gone, and likely Terastilizing too, I think it both loses a lot of options to pass to, and as defense gains some momentum meta-wise, we'll see some Haze Pokemon come out to help limit setup, as well as more Taunt users besides Grimmsnarl. The fact the Sub doesn't protect from Hazards as well I think enables fighting back in this particular meta. Shed Tail also gets shut down by the better priority users, particularly those who will rise again once new toy syndrome wears off such as Breloom and Scizor. That said, Shed Tail is definitely preferable for the chopping block than Cyclizar, which I don't think is as good without it. Orthworm's Shed Tails are scary too, but also currently harder to get off. Shed Tail also goes hand in hand with...
Iron Valiant: This one's a real tough call and is the most "could go either way" for me. In the initial week, I don't think it was as strong as it could be. But with fast Ghost types using Fairy-moves Houndstone and Flutter Mane gone? And with Roaring Moon, the only faster Paradox Pokemon, also gone? I think Valiant is gonna open up a lot. It does crumple to Scizor, but that's a problem alleviated by Screens. Yet it also gets ruined by Unaware staples Dondozo/Clodsire/Quagsire. Iron Moth and Psychic Volcarona may also be options (with Agility Iron Moth in particular being a Pokemon with a lot of potential once Palafin is gone). For the moment, I'm going to say Quick Ban based on how it'll likely perform with huge threats to it gone. I will say, however, once Home is out I think this is a top choice for potentially returning based on how the meta shakes out. There's a number of Pokemon likely to return that I see helping deal with it.
Iron Bundle: Quick Ban. Insane to me that this one is more up in the air and isn't top of the list. All the same offensive presence as Kyurem used to have, but with more options due to its speed. Every time I've seen this thing, no matter what I run, I hate it, and I don't think a return of Blissey or a rise in Breloom will fix it. Maybe this one's personally biased, but I feel really strongly that people are underestimating Delibird But Good. Begone, vile thing.
Booster Energy: Suspect. If everything I've said Quick Ban for is gone, Booster Energy loses a lot of versatility. It turns all of these Pokemon that use it into Hawlucha: things you can't bring in until you can confirm a sweep. That said, it's also an even harder argument in favor of Item Clause (my favorite niche opinion) than Heavy-Duty Boots, because you stack a bunch on a team and just progressively overwhelm. I also agree with the sentiment that with the Quick Bannable Pokemon gone, the number of Paradox Pokemon to truly benefit from Booster Energy overall shrinks. Yet I do think that in turn opens up the argument regarding Sun and how many more options that playstyle now has compared to other weathers, even with Mane and Moon gone. Great Tusk in particular is going to become a huge danger under Sun. Ultimately, in my eyes, Booster Energy is more controversial than Terastilizing, and a Suspect more likely to go either way.
There's a couple others I can see having their moments once these changes are made (Iron Moth, if Booster Energy stays, will be potent with Agility and Fiery Dance, Glimmora might get looked at for its sheer hazard stacking potential, and Gholdengo in compliment is really, really annoying as a Spin/Defog blocker). But for the moment, I think the new meta fun is starting to wear off for me, and I think these are the changes necessary to make the game actually playable as a competitive environment. I do think this will still result in a more offensive metagame than we've ever had before, but one that is sensible and strategic rather than a raw constant battle to the death.