Although you've got a point about the Sandy Therian metagame (that's not a bad team O_O), I personally sort of like it when there are a couple of limitations. It gives way to creativity in its own right, and working with what you have been given.
For example, knowing that Tyranitar will be present everywhere, it could increase usage of Cloud Nine Altaria and Golduck, Starmie, maybe even Rain Dance Crobat. Also it gives more spotlight to other pokemon like Gothitelle (Shadow Tag + Perish Song) and Escavalier.
Also, I beleive the Autumn Friendly in Japan was revealed before the official VGC '11 rules, so this could be it, I wouldn't rule anything out.
I'll also play VGC '13 no matter what the rules, but I wouldn't mind if this was it and they decided to be a little more predictable :)
(Also if this belongs in the regular VGC thread so be it, I'll let a mod decide that)