EDIT: I don't think your middle ground solution is going to work. You're still proposing we ban a trait that isn't inherently broken in and of itself, which is primarily the reason we've ever banned moves and abilities anyway. Double Speed itself under X condition is just not broken and we don't get to just pick and choose between who gets to have the ability and who doesn't. Banning Drizzle or Toed entails banning only one ability as opposed to several, when said ability isn't even broken.
I agree, Swift Swim/Sand Throw on their own (i.e. with only Rain Dance/Sandstorm to abuse them with) are not inherently broken. But are you suggesting that Drizzle is inherently broken? Do you really think it's the 50% boost to Water moves and the 100% accurate Thunder which sets Drizzle over the top? I don't personally, and even if you do it's something that ideally would be tested.
My point is it's the
combination of Swift Swim and Drizzle which people find broken. Because DrizzleToed was introduced only this gen. it's easy to come from 4th gen. with the mindset that Drizzle is what breaks Swift Swim. But if you look at this generation as a standalone generation, a solid argument can be made for Swift Swim Breaking Drizzle (the only possible exception being Manaphy, but that thing is on the fence with or without Drizzle so I don't think it's really fair to consider it).
So if we can agree that neither ability is inherently broken but the combination of them are, why should Drizzle be the one to go? Because it's the "new" factor this generation that's throwing the balance off? No, for the reasons explained in the above paragraph. Because it would involve banning only one Pokemon's Ability as opposed to ~ 15? You
may have a point here, but I've checked and _every_ Pokemon who gets Swift Swim has at least one alternate ability that can currently be obtained legally. So isn't it better to have a watered-down Rain Offense/Rain Stall presence in OU than a bunch of Swift Swimmers who will hardly every even be using their ability?
Ok say Drizzle isn't broken (WHICH IT IS), the metagame will be utterly centralised around Rain and Sandstorm teams. Hopestly the reason this metagame has been awful to play has been because of 3 reasons: Shaymin, Inconsistent and Rain. Rain is such a god damn easy strategy to use, it is the least skillful I have ever seen. It is mindless, all you have to do is spam attacks while you are miles faster than any other non rain sweeper. Rain is so broke that people are using stupid things like Timid Specs Kingdra to counter it. If that doesn't show it is broken I do not know what is.
I've been laddering consistently over the past few weeks, at least 20 times a day, and I swear I've seen more Tyranitar/Hippowdon than Politoeds. The usage stats on PO (okay yeah different server, ban list etc, but they still hold some credence) suggest the same thing. Removing Rain will only make things even more centralized around Sand Stream teams.
As for banning Swift Swimmers, I personally still believe the power of Water attacks in rain is the problem. I personally used Gyarados on a Rain team and it worked fantastically due to its ability to check some common rain counters, and just being a general good switchin. Would a Kabutops with no Rain attack boosts still be good with 500+ Speed? Yes. Would it be broken? Probably not.
Fair enough, at least you're actually addressing my argument now. But I disagree that the power of Water attacks in rain is the problem (it's definitely great but it's not what many people find so fearsome about rain). Please read my response to SJCrew as it addresses this point further.
We can agree to disagree on whether the Water STAB boost alone without the Speed Boost is broken, because without further testing everything is Theorymon. And really it should be tested because I have a hard time imagining without the Speed Boost that people would find rain so hard to handle. We don't have any Water types with absurd Special Attack (in the 130+ range) I'm pretty sure Omastar (who is lolish without Swift Swim) is highest at 114. On the physical side, Gyara and Kabutops are fearsome, but Waterfall is their only legitimate physical Water STAB which, remember, only has 80 BP. A 120BP move (after Rain) on something with 125 Attack is hardly game-breaking.
In conclusion, even if you don't think Rain is broken, its pretty obvious that it is super centralising. Another period with it will be god awful and I don't think it takes another period to prove that it hinders the metagame by a significant amount.
Sand Stream is as centralizing or even mores-so, and will DEFINITELY be more centralizing if Rain is banned. Considering your vehement hatred of Rain I'm not expecting any of my post to get through to you though.
Thank you for your support.