Alright. My finals and interviews have cooled down for the most part, and it seems like I've come back to a war zone. Hopefully I can provide a bit of insight into why I voted/nommed the way I did. And hopefully this goes back to actually useful discussion on what is (not) broken and why.
I understand that these "quickbans" might seem quick to some people, but from the council's perspective we've been discussing them since the first week of October along with the initial banlist. After a long discussion we decided to clear the whole banlist bar luck-based things like King's Rock and Accupressure and make some rapid decisions once the metagame itself rolled out on what was still broken, with a keen eye on anything that was previously banned. I personally didn't, and still don't see any metagame trends that make the big setup moves any less potent than they were last gen, particularly with the rise of fairies making sableye harder to justify and the general power creep making unaware mons less effective. In my mind, that along with the fact that either they or almost all of their best abusers were banned in the last 3 iterations of STABmons led me to decide that they were still broken and should be quickbanned. I don't see anyone arguing that these should be unbanned, so I'm going to assume people are on board with at least this much of my line of reasoning.
Moving onto 1k Arrows. I played about 50-60 games against people in a mock up of what gen7 STABmons would look like with the gen6 banlist + the new mons and moves in November in a combination of tours and private matches. Easily a third of those games came down to [offensive ground type] sweeping with 1k arrows. Fissure, Funbot, and Betathunder can attest to this, since they were the main people I was playing against. This set off a red flag for me, so I played a bunch more games once the metagame came out for real, and lo and behold the same thing was happening. I'm personally a fan of concise banlists, so it didn't even cross my mind to test lando, garchomp, garchompite, excadrill, etc., since to me it was clear that they were broken due to their newfound 1-move coverage in conjunction with them all being naturally good pokemon that have options to beat the 4 pokemon that actually resist it (Celebi, Tapu Bulu, Buzzwole, and [fudge factor]). I thought that the cleanest thing to do would be to take that new toy away and put them back into their already powerful, but definitely manageable state.
And finally MegaGross. This thing is really dumb to play against if you want to switch into it. Skarmory is a hard-counter, no questions. I wouldn't count anything else in that list. I'll try to dig through my replays to find HP Fire MMeta smashing through a scizor if I get the time, but 105 SpA is nothing to scoff at for mixed tech (before you tell me it's dumb, it kills sciz, ferro, forre, and chunks skarm without worrying about KS). Grass Knot destroys Slowbro, Quag, and Hippow. Hammer Arm wrecks Heatran and Ferro. Psychic Fangs beats rotom and quag. Ice punch demolishes lando and chomp. I really hate going through this list, so I'm just going to stop here. Maybe I just have PTSD about this thing from all the degenerate games where people send in their MMeta against he opponent's because that's the best they had left after their lando, rotom, and heatran died to coverage. Maybe I'm wrong and this thing is completely manageable when it doesn't setup. Either way, that was my line of thinking, and I'm sticking with it for now.
I do not want to roll back any of the initial bans outright at the moment. I'm happy suspecting Silvally in a more classical approach. I'm open to retesting 1k arrows and MMeta down the line once the current slate has been looked into if that's what you all want. I'm not open to reading any more ultimatums about how I would be a failure if I didn't do X particularly if they aren't accompanied by any substantial analysis of why we done goofed. That's a waste of everyone's time. Full disclosure, I do have a large stake in getting plenty of stuff banned before the month is over because I fully intend to keep playing STABmons after December when it has no ladder to test on, and I don't think it's appropriate to ban most of this stuff at that point. I think that our current ban rate is acceptable because we unbanned 13 things to kick off the start of this month for completeness and I don't see many reasons not to re-ban most of them again (MMeta, MAero, MAlt, Shift Gear, Shell Smash, Geo, BD, Lovely Kiss, Dark Void, Diggs, PGonZ, KyuB, and Thundy-T). Holding 10 of these suspects individually along with 3-4 gen7 ones and giving a week or so in between for things to settle is impossible, so we're compromising with what we think is the second best approach. None of us think that this is a perfect solution, but we're not OU and we don't have a massive playerbase and years to suspect things, so we are taking shortcuts and we realize that. I'm sorry for a rough restart to an otherwise wonderful metagame.
Happy stabbing!