42% of the votes, 6/14, is less than a majority. Favoured? Yes. But a clear outcome? I think we need to spend more time discussing how we approach this. That being said, I think you are clearer on what you want out of the guidelines than I am.
Primal Groudon is definitely overcentralising and singlehandedly warps the metagame, but I don't know if that makes it banworthy under the definition we go for. But I want it and Pokemon like it - Pokemon that singlehandedly make otherwise top Pokemon unviable - to be stuff we can get rid of.
Btw, do you know what Smogon's reason is to ban something? I think I saw something about it being about overcentralisation but I don't know honestly. Pdon is definitely overcentralising, but it's not broken as an offensive Pokemon and the metagame with it permitted is still deep (I think? I still struggle with that notion) but there are definitely fewer viable options because of it.
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I also want Mewtwo to be banworthy and I think our guidelines should enable us to be able to ban it. It's the same for me with Mewtwo as with Pdon, but Mewtwo is the least controversial thing to want banned ever. I think if our guidelines didn't make it easier to ban Mewtwo than to argue against banning Mewtwo then it's inadequate, and I don't think that's controversial, even if in some way it's working backwards from our conclusions.
Regarding the voting, I think the A&B option is ambiguous- is it both proposals? Is it a "no strong opinion" option? idk. Either way it's problematic, since you could have both sides claim a majority or neither side claim a majority quite easily.
Hmm well I disagree with you on PDon, since I think if the metagame's fine with a dominating presence (to be clear, I'm not remotely sure this is the case with PDon, it could be busted regardless) then that's acceptable. To go beyond that is implementing bans that don't address any need, something I don't think should ever be done by any competitive community
Off the top of my head, smogon's policies are similar to your's, but I would need to look that up to say for sure
No-one else has chimed in on our debate on the merits of rby ubers so it's hard for me to say, but I don't think RBY ubers is remotely close to being in an acceptable state under my guidelines and I don't imagine I'm in the minority on that one. The reason I brought up the condition of being able to sustain many years of competitive play was to illustrate that the standards for depth should actually be really high, and therefore merely having a few different options is not sufficient. RBY ubers has like 8 pokemon that aren't gimmicks, the majority of which have literally no flexibility in how they're played. I'm not saying there's no depth to be had, since almost any game has some depth, but it's not nearly enough to be considered adequate