I think the whole point is to start ou with nothing banned, then ban for balance. The problem with why everyone thinks this is not a good idea is becuase they see shit like skymin to be broken individually, but when you have a proper metagame similar to ubers, these individual pokes are not broken. All you have to do then is just ban the pokes that are too strong for that tier, like mray and geoxern or whatever. Basically, ag+extra bans becomes the new ubers and old ubers+bans=new ou
Okay, why? Seriously, what's wrong with the current tried-and-true OU structure that has carried Smogon through six generations of competitive Pokemon? I have yet to see a logical response to this question, and whenever it's posed it is answered with pure speculation e.g. "I think OU would be better if we (x,y,z)" but never "I think OU would be better if we (x,y,z) BECAUSE (a,b,c)". You can't frame it all in a paradigm of philosophy when the status quo philosophy works and yours is untried. "But but quickbans!" Would you not have banned Arceus from OU, or Kyogre/Groudon/Dialga/Rayquaza/Darkrai? If you answer YES to this question, you enjoy seeing the same 6 Pokemon on every. single. team.
Another thing: what is the sudden reason to turn OU into Ubers? Is it simply because we now have access to Anything Goes? You state that the point is to "start OU with nothing banned, then ban for balance", which is exactly what we already do. You're conceptualizing it incorrectly. You seem to think the status quo is along the lines of
1) stuff that's obviously broken gets preemptively banned
2) tier goes into competitive play
3) later, things are banned for balance
when in reality it's more like
1) tier goes into competitive play AND stuff that's obviously broken is banned = banning for balance
2) later, more things are banned for balance
Balancing a tier doesn't occur in spurts, it's a permeant process. Externally it appears to be voting stage by voting stage, but that's only the final aspect of decision making. Discussion is ALWAYS revolving around any given tier and the process of balancing includes said discussion, which preempts any bans, and that's completely ubiquitous. Even if something's quickbanned, that's because admins got together before competitive release of any given tier and decided that whatever shit they end up quickbanning deserves it because it's beyond clear that it would be broken if allowed in competitive play and be banned by a huge margin regardless. In summary, that's just saving the community time to make more impactful decisions that are actually being contested instead of crying about how they think Mewtwo would be SUPER FUN in OverUsed.
So your argument is that we should make one tier into another tier...when that other tier already exists and will continue to exist...because we're adding a new tier. Which makes zero sense no matter how you slice it. By your very own syllogism, OU should have become UU when we created NU. Except it didn't, because the community doesn't think we need a Matryoshka doll of metagames that supernaturally rearranges itself every 6 months.
From my point of view (and I think I'm not the only one):
ag+extra bans= ag
old ubers+bans = new balanced ubers (w/more bans other than m-quaza)
ou still goin for its own, where stuff that has to be banned will be banned as well with current suspect ladder+live tours method (w/philosophy that prefers a desired meta rather than lookin at suspected mons as how can they be broken by themselves)
Again, that's already what we do. You think complex bans like SS + Drizzle would exist if we only looked at how Pokemon could be broken by themselves? You think Volcarona would still be around? Our status quo philosophy prefers a balanced metagame. I get it, haha weather, haha Reuniclus. I didn't say it was perfect. But if we only suspected shit because it was exclusively solo broken beyond belief, OU would just be BW1 + Torn-T.
There's zero reason to pop open the biggest philosophical can of worms imaginable, in order to take a gamble on the metagame somehow improving in balance and diversity (it won't), when nothing is wrong with the current system.
Prague Kick, my bad, thought you were arguing for dice's side fsr. The wording was a little unclear.