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.
@SlimMan: ridiculing a suggestion is easy, but you haven't disproved me. Banning Manaphy+Surf combo wouldn't help the metagame, while banning Latios+DM would balance OU and keep another check to major threats around.
@Erazor: so a pokemon "raping" two viable playstyles isn't broken?