The metagame is ass. There is not a good balance between offensive and defensive threats (never has been as this tier is sort of an special case, tbh) and the solutions proposed in the last few years (all these meme votes and stuff) in order to try to make it better have been uneffective and/or insufficient.
When you look back and observe that memes like Cloyster have had a tiering vote before this thing, well.. Really makes you think.
Thundurus-Therian is simply too powerful for this metagame. Aside from random scarfers, the only pokemon that kills it reliably (100% of the time) while being faster is Specs Keldeo with Surf in rain. Latios folds to Thunder paras on the switch and can easily be EV'd to survive a Draco Meteor, as Specs or Life Orb aren't as viable as they were years ago. Blissey and Chansey get 1v1'd by Focus Blast if they switch into Nasty Plot, and the best they can do back is try to Toxic which can miss or fish for a random Ice Beam freeze if you even have the move. Random Grass Knot will knock out your Gastrodon or SDef Hippowdon on the switch. The list of such cases is pretty big and I don't think I need to further expand on it.
This pokemon arguably deserves a ban already, and if you have tried to actually build you know how much of a headache it is to keep this thing in check. I have no doubt the metagame will be way better without it and keeping it is a mistake.
I have always defended this thing as necessary in the tier, even being skeptical about the Sand Rush ban despite being absolutely stupid to deal with. Sand Force is not too far from its sister ability in terms of absurdity. Ever since people discovered SD can be used on it, you are not safe even running the second best counter in the tier (PhysDef Skarmory). I have lost the count of how many times I have seen or experienced myself Excadrill 1v1ing Skarmory after clicking Swords Dance and Iron Head. I still don't know how I feel about its presence, but I can say it is problematic to say the least. Obviously not in Thundurus-Therian tier as with offensive sets Excadrill dies pretty easily and has a lot more Pokémon that outspeed it, but unlike DPP Jirachi this mon has 35 more base Atk and a free Life Orb to sweep. Obviously, it is just Sand Force what I think can be argued about, Excadrill itself is necessary on the tier.
*gems*
Simply vote again, and hopefully with a reduced list this time. Making top16 of BW circuit is not remarkable enough for tiering votes, I'm afraid.
Now... For a while I've tried looking at the list of Ubers and see if there is anything that can be dropped to add more diversity to the tier. The conclusions are the following:
Genuinely terrible, is not even used in the tier above (because it sucks). Wouldn't even reach top10 usage in OU. The only reason to mantain it in Ubers is because Smogon's garbage tiering policy does not want 680 BST in OU. Yeah, god tier bulk with an ability that soaks damage if HP at full. In a tier where Sand is permanent, Stealth Rocks are always up, status and Knock Off are as prominent, and Magic Guard users are law and order. How great. Clefable in gens 6-8 and Toxapex in 7-8 are far better than what this would ever be here. The tier would gain a great check to Dragon and Ground types, which are incredibly busted and hard to check. And to Volcarona, I guess. HO teams would probably struggle a bit to kill it but it is something that can be easily teched for without giving up too much. I expect nothing out of this suggestion, because again, tiering policy on the site is a meme.
Would be a nice addition for HO teams, which are really at an all time low in usage. The tier would also gain a good Spiker. Like Lugia, it pretty much suffers from the same problems except it is not weak to SR and has Pressure. Defensive sets might seem too annoying but I think it heavily suffers from 4MSS. Definetely worth a retest imo, only that would be able to tell if stall sets are too much, but I doubt it would differ much from Mew and Clefable in that regard.
The other mons that were OU at some point are too powerful to be up to consideration. Tornadus-Therian would be in the limbo but I predict its speed tier and versatility are still too much for the format to handle.
I would also like for other respected tournament players to post their thoughts on the metagame and their own suggestions to make it better.
Thanks for reading.