It seemed to me that banning the combo of Drizzle+SS on the same team also went against the policy followed by Smogon in the previous generations. Although there was no official rule regarding simplicity, PR always decided on the less convoluted solution. Taking action against a specific aspect of the metagame (the Drizzle+SS ban) was a step towards a shift in policy, less hostile to complexity. In short, a complicated ban of a specific aspect of the metagame no longer goes against Smogon's philosophy.
"Latios breaks OU"
This is my opinion. I think Latios's choice specs set is too much for standard play and a ban in this case would make the metagame healthier. Apparently 60% of players qualified to vote last round didn't agree with me, but i'm confident this is only because every single one of them had a dedicated counter in their team (Nattorei, Tyranitar, or both). Players who don't want to use sandstorm and defensive pokes must face the fact that their teams are Latios weak, and they'll have to lose a poke to boosted DM each time it switches in against something slower. If Latios didn't have DM though, it would be perfectly manageable; its choiced sets would be much less powerful, and it would have many more checks to limit its rampage (even Togekiss can check it without DM). By banning Latios, we make the metagame healthier. By banning the Latios+DM combo, we make the metagame healthier AND keep a much-needed check to Virizion and Garchomp around.
You need to realize that i am not against Latios being banned. Quite the opposite actually. This is merely a proposal to counter the main argument for him remaining in standard, that he's necessary to hold back some specific threats. I just want to portray this as a possible solution.
@Erazor: so a pokemon "raping" two viable playstyles isn't broken?
I don't know whether you're bitching or just theorymoning. Personally, I think the weather ban was an exception, since weather is entirely different from a move or an ability. A move may break a pokemon, but a weather may break a team. So weather deserves to be treated differently from anything else. In regards to moves, ability, and pokemon, I believe that we should still stick with "simpler is better" and leave as much as we can intact. Because we wouldn't want to start a slippery slope (non-drizzle level 80 Quirky Kyogre without waterspout/surf/hydropump is usable in OU guys!). Remember, we have precedents for moves that break pokemon (Like Darkrai with dark void), but weather has no precedent.
This argument has been posted over and over again: if you are complaining that a pokemon can consistently rape your team, you are the one who needs to adapt first, before starting to complain about whether or not said pokemon is "broken." So consider adapting. I run a hyper-offense team and I have no problem with DM Latios. Remember -2 Latios = setup bait to any semi-bulky sweeper.
However, in regards to your arguement about banning DM from latios would result in a healthier metagame, we do have a precedent in Latias from last gen. Banning Latios will remove a viable check/counter from the OU metagame, but removing such a central pokemon will cause an increase in diversity. Last gen, my entire team hinged on latias being able to wall threats such as infernape. Once it was re-banned, I suffered a huge losing streak until I was able to adapt my team sufficiently. From there, I discovered several great pokemon that I otherwise would never have used. Basically, if you gave me a choice of a metagame where non-DM latios is used on every other team (exaggeration, I know) or a metagame where I see sazando, ulgamoth, denchura, and other relatively uncommon Special attackers, I would choose the latter, even if I lost my garchomp counter. Because I could always get another one of those.