I believe that banning all auto-Weather abilities on the basis of "simplicity" is ridiculous for several reasons. The most important of these is that not all of the Weather conditions have an equal impact on the metagame. Drizzle and Drought (but mostly Drizzle) have far more Pokemon that can take significant advantage of the effects they provide than do Sand Stream and Snow Warning. I can understand banning Drizzle and/or Drought on the basis on the effects they provide simply because banning all the "abusers" is impractical. I do not see, however, why this should in any way affect Sand Stream or Snow Warning. With regard to Sand Stream, has anyone heard any player complain about Pokemon other than Doryuuzu and Randorosu in Sand? Given the option between banning Tyranitar and Hippowdon or Doryuuzu and Randorosu, I would choose the latter, simply because I know for certain that Tyranitar and Hippowdon are not unbalanced without Doryuuzu and Randorosu, yet do not know for certain that Doryuuzu and/or Randorosu are not unbalanced even without Sand.
Aldaron's suggestion seems acceptable to me, simply because it could potentially balance Rain with a single ban. I am skeptical that it would actually do so, since I suspect the other benefits of Rain will still be excessive, but I am certainly willing to see that in an actual test rather than merely theorymonning it.
Aldaron's suggestion seems acceptable to me, simply because it could potentially balance Rain with a single ban. I am skeptical that it would actually do so, since I suspect the other benefits of Rain will still be excessive, but I am certainly willing to see that in an actual test rather than merely theorymonning it.