If you ban Snow Warning and Snow Cloak, you're saying that combo is far too powerful to exist in a healthy metagame. If that is so, then please explain to me the broken set Swinub can run to break UU. No takers?
This is terrible logic. It's like saying "well if you think Garchomp should be banned then prove to me that specs chomp breaks the metagame". In order to ban something, not all instances of that thing need to be broken, just one. Banning all of garchomp's non-broken sets by banning garchomp is no different than banning the non-problematic usage of Snow Cloak in hail by banning the problematic usage of the same.
The reason complex bans exist is because they can sometimes create a better metagame than if we simply bludgeon an entire pokemon or playstyle out of existence. This was the reasoning behind the drizzle/swift-swim ban. In the case of froslass, it's an incredibly popular non-broken spikes user outside of hail. There's no real reason to ban all usage of froslass when we can just ban its usage where it is problematic - in hail.
You might be tempted to make a slippery slope argument at this point, and I can understand why. I mean, there may be nothing stopping us from, say, banning draco meteor on dragons (to take an old example) if we embrace complex bans. But nothing
should stop us from doing that if it would be best for the metagame - in that particular example, the complex ban has a much greater scope and impact than I personally would be comfortable with, but if the other option (hypothetically) happens to be banning every single dragon in OU, I can see why some people would be open to considering it.
I have never liked traditionalism. If you have a problem with this particular complex ban for some reason (like saying that the cost of instituting it is greater than the possible benefits, which I would easily see being the case), that's fine. But don't say things "on principle we should only ever ban pokemon" because I have no interest in needlessly constraining the options available to us as a community.
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Back on topic, I'd like to summarize the positions of the various members in this community so we can focus on finding the best one instead of having all the sides engage in a free-for-all. And let me know if I missed something.
We can vote such that all evasion-modifying abilities are illegal in all circumstances (General Snow Cloak/Sand Veil ban).
We can vote such that all Pokemon on a team which can create a certain form of weather cannot have any ability that increases their rate of evasion due to that weather (Snow Cloak/Sand Veil and Weather complex ban).
We can vote such that individual Pokemon with evasion-modifying abilities in a certain weather are illegal in that weather (If Froslass specifically is broken in hail, Froslass is banned in teams that can use hail).
We can vote such that individual Pokemon with evasion-modifying abilities in a certain weather are illegal in that weather (If Froslass specifically is broken in hail, Froslass is banned on all teams).
Given these positions, we can focus on two issues to resolve the whole debate:
1) Pokemon ban or ability ban?
2) Complex ban or simple ban?
What do you guys think?