All of that being said, coupled with a tier rename ("Tier 1" "Tier 2") this could be a pretty good compromise! Any "no banz" purist can play Tier 1 (Ubers now) where only the most over the top stuff gets banned, if at all. People seeking a metagame closer to Base 600 could play Tier 2, then so on and so forth. Not saying I totally agree with it but there's merit to the idea, I guess.
I absolutely agree, this was discussed in IRC not too long ago - calling it OU or Standard isn't correct, it happens to be what we play the most. The reason OU was standard in RBY was because there were so few. And we've been working with that same metagame over the years - the one with Starmie, Snorlax, Gengar, and Zapdos. This is why our ban list now seems so large - because we want to keep the metagame we've become accustomed to. There's nothing wrong with that, but the fact that our ban list has now evolved into a fully playable metagame where there are only two or three very specialized exceptions to what is banned shows that we need to rethink our logic.
OU is the standard because it is the most popular. It will always be the most popular, there's no avoiding that. We have to bear in mind that until recently Ubers was basically people using what wasn't allowed in OU as they pleased. There have been one or two little bans put into place, but I think right now, Ubers is still what it basically is - a chance to use whatever you want. And I think Eo has the right idea - when Ubers becomes unplayable, that is, when we get a Garchomp situation in Ubers, that's when we should consider banning them. And quite honestly, at that point, we then need to make a new tier, eg "Beyond Uber" for this renegade pokemon. and considering pokemon wont stop for several years, this renegade pokemon is gonna come sooner or later.
So obviously, changing the tier names makes it easier. Little Cup should be preserved, but NU should become Tier 0, UU is Tier 1, OU is Tier 2, etc. I know this is completely counter-intuitive in that Tier 1 is usually regarded as the best of the best, or in this case, Standard, but like I said, Pokemon is an ever growing game, and when the current ubers gets something too powerful for it, that will be banned. This will go on and on, and eventually, "too good for ubers" will become it's own tier. And what happens when that gets something way too powerful? This way we can keep adding new tiers with ease.
However, more to the point of the original topic - Ubers already is an official metagame. it is also a ban list. It just happens to be a playable banlist with its own meta. OU is a ban list for UU, technically, and UU is a ban list for NU. I don't think it's "making people get the idea that Ubers is a ban list out of their heads" sort of thing, it's a "OU isn't really the Standard, it is just the most played."
Just because we base most of our policy around it doesn't mean our world has to rotate around it.
I think every tier should have its Policy and Metagame treated with equal importance.