I will say firstly, I very much support a evasion abilities ban. The articuno snow teams (and snow teams in general) would still be pretty good and would make them more legitimate, as they mostly rely on the massive bulk they gain from snow + aurora veil while using powerful blizzards to get big damage and freeze. I've been using a glaceon snow team and the snow cloak aspect isn't even a large part of it, only another thing that can make it more dumb.
https://replay.pokemonshowdown.com/gen9doublesou-2105190429-ov1a2crpcny2y4736utnmqj4q49ztnepw?p2
While the linked game is using an older team, it still shows how devestating evasion abilities can be. I got 4 snow cloak misses in that round and it just made the game easier because of that. Said snow cloak ban would mean I would have to use ice body, which wouldn't be too much of a big deal and means glaceon could still a defensive beast.
Now, for the other points.
This mon is dumb, I would support a ban. It is basically the only tailwind mon you should use, everything else is much inferior. Dragonite can technically tailwind, but you want to use banded e-speed more likely. The next closest tailwind users are in Tier 4, with pelliper, who is limited to a specific playstyle, and whimsicott, who is mostly balanced (but I'll talk about the problematic part later). It also single handedly ruins any weather which means any weather setter is much worse off. It's also the best weather setter itself, so that's a problem. There's probably more to say, but I've talked long enough about it, ban it please.
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Idk about these ones, they feel very powerful but potentially not overwhelming. Chien pao feels dealable with its frail nature and its overeliance on sash to not get destroyed after one turn its out. Gambit is a bit more concerning due to it punishing any intimidate users immensly, while not being bad if it doesn't get that matchup. But I'd like others input since I haven't seen them too much.
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I think that arch on its own is a fine mon. Very powerful, but it can be dealt with due to its lackluster special stat and to patch that up it can't have other stuff like safety goggles. The main issue I have with it is the beat up interaction. Now, I think most other justified users are alright with beat up, the closest justified user to OU is arcanine, who will want to run intimidate regardless. Every other justified user is alright. With arch however, not only are you raising your defense, but making a super powered threat that can ohko most things that don't resist it or are immune to it, which is restricting. I wouldn't have a problem if arch is banned, but I think there should be talks about what the true issue with the strategy is because there seems to be more than meets the eye under the surface.
Nah, this ain't a problem (this is talking about tera). We don't need to ban it.
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Please don't unban any of these. I would say that you could ban commander on tatsugiri, but that's a roundabout solution, so just keep tats banned. The strategy of commander is too centralising and makes teams have to overcompensate. Kyurem black is way too powerful for the tier, good bulk, good enough speed and immense power. Urshifu rapid strike breaks doubles with unseen fist, defensive counterplay is limited. Please don't unban these, the metagame would go in the dumpster.
No, I don't think amoonguss should be banned. This is talking about sleep. IMO, sleep is busted. We already have the gravity sleep clause, so let's just do the full yard and ban it. Amoonguss is the most problematic part of this as it means trick room teams are basically going to be dead weight unless they have heavy safety goggles usage. This is a big thing, because safety goggles is otherwise a useless on a mon, but amoonguss means you have to have one mon with the item. Torkoal with yawn is also really annoying to deal with, and can be pretty big when its threatening eruptions all the time. I've even used yawn on bloodmoon and it still is an amazing move on it. There is limited counterplay to sleep, as the combo of spore + yawn means not much wants to take it. There are quite a few grass types in the tier, but I don't think they should be necessary to stop one matchup will be dead against everything else.