There is something tangibly different between Pokemon + Ability ban vs Pokemon + Move / Pokemon + Level bans. More specifically, moves and levels do not affect the identity of the Pokemon as drastically as Abilities.
Think of Magnezone, for instance. A Sturdy Magnezone would have its niche replaced from a Steel Trapper to an overshadowed Electric Powerhouse. Abilities change the identity of the Pokemon so drastically, that a Pokemon would be played differently (ie Protect on Blaziken to grab Speed boosts / Substitute on Garchomp to fish for misses). Some say that this is nerfing, but others see the same Pokemon with different abilities as separate identities altogether.
When it is so blatantly apparent that an Ability have warped the Pokemon's identity to such an extent to brokenness, I do not find it unreasonable to ban the Pokemon + Ability. Banishment from every tiers but Ubers is a harsh outcome, and I believe that certain Pokemon, like Blaze Blaziken and Rough Skin Garchomp are two good Pokemon that can enrich other tiers. Blaziken has a unique combination of Power and Versatility that other Physical / Mixed Fire Pokemon lack (Infernape hits softer; Arcanine, Emboar, and Darmanitan do not have STAB HJK). Garchomp has a distinguished Speed Tier, offensive and defensive characteristics that cannot make the game worse to say the last.
Pokemon + Move / Pokemon + Level, however, does not really change the identity of the Pokemon the way Abilities do. A Sand Veil Garchomp without a Swords Dance, is still played as a Sand Abusing Sweeper, but except now it is worse at its job. If anything should be called nerfing, it would be these types of bans.
To me, Pokemon + Ability ban does not seem such a far-fetched idea as Pokemon + Level / Pokemon + Move. I am not saying that we should do this for determining the tiering process of the lower tiers. Lower tiers are shaped solely out of the usage statistics of the Pokemon in the tiers above, so we don't need to change that. However, as something as big as banning a Pokemon from OU (and by extension all other tiers except ubers), I believe that Pokemon + Ability ban is not such an unreasonable suggestion.
PS - I guess the Pokemon + Ability ban may be considered for other tiers, namely UU (to banish monsters into BL) and LC metagame. However, this is arguably more relevant in OU than in any other tiers.
Think of Magnezone, for instance. A Sturdy Magnezone would have its niche replaced from a Steel Trapper to an overshadowed Electric Powerhouse. Abilities change the identity of the Pokemon so drastically, that a Pokemon would be played differently (ie Protect on Blaziken to grab Speed boosts / Substitute on Garchomp to fish for misses). Some say that this is nerfing, but others see the same Pokemon with different abilities as separate identities altogether.
When it is so blatantly apparent that an Ability have warped the Pokemon's identity to such an extent to brokenness, I do not find it unreasonable to ban the Pokemon + Ability. Banishment from every tiers but Ubers is a harsh outcome, and I believe that certain Pokemon, like Blaze Blaziken and Rough Skin Garchomp are two good Pokemon that can enrich other tiers. Blaziken has a unique combination of Power and Versatility that other Physical / Mixed Fire Pokemon lack (Infernape hits softer; Arcanine, Emboar, and Darmanitan do not have STAB HJK). Garchomp has a distinguished Speed Tier, offensive and defensive characteristics that cannot make the game worse to say the last.
Pokemon + Move / Pokemon + Level, however, does not really change the identity of the Pokemon the way Abilities do. A Sand Veil Garchomp without a Swords Dance, is still played as a Sand Abusing Sweeper, but except now it is worse at its job. If anything should be called nerfing, it would be these types of bans.
To me, Pokemon + Ability ban does not seem such a far-fetched idea as Pokemon + Level / Pokemon + Move. I am not saying that we should do this for determining the tiering process of the lower tiers. Lower tiers are shaped solely out of the usage statistics of the Pokemon in the tiers above, so we don't need to change that. However, as something as big as banning a Pokemon from OU (and by extension all other tiers except ubers), I believe that Pokemon + Ability ban is not such an unreasonable suggestion.
PS - I guess the Pokemon + Ability ban may be considered for other tiers, namely UU (to banish monsters into BL) and LC metagame. However, this is arguably more relevant in OU than in any other tiers.