Is there some unwritten law that says that Hyper Offensive non-weather teams HAVE to be viable? Or that Scarfers HAVE to be viable? Seriously, this is competitive play, if something doesn't work, then don't use it, simple as that.
This "play to ban" mentality smogon has been showing lately is seriously getting on my nerves.
The issue isn't that the metagame stops it from being viable.
It's that Excadrill, with minimal support [Switching in Tyranitar at some point], can not only render two playstyles useless, but also does a massive number on... basically any team that's not carrying Gliscor.
Even Skarmory is shaky, as it will get worn down, especially if it WW's in something it can't Roost on.
Honestly, the comparison to the Gen UU Yanmega is pretty accurate.
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As for the Sand Veil debarcle... isn't bannng Sand Veil to save Garchomp pointless? Garchomp gets soft banned under that. Banning Sand Veil would also soft-ban Cacturne who gets useage in the lower teirs, while it still doesn't free Garchomp until his Dream World Ability exists.
Not to mention an ability is only banned if it's broken on everything that has it. Note Swift Swim itself wasn't banned, and note Blaziken.
Cacturne and Sandslash are not broken. Garchomp's staying where he is for the forseable future. Garchomp is broken because of Sand Veil + Everything else Garchomp is.
Meanwhile, you can't really compare Sand Veil and Brightpowder/Insense.
Those two items exist for the sole purpose of introduceing more hax into the game. You chose to introduce that hax.
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And, I'm amazed people are seriously nominateing No Suspects. The OU metagame is incredibly centralised, need I bring up Gastrodon again? Although, part of it could be people wanting to see what the Thunderus-less meta is like.