>>22749359There's something wrong with that logic, seeing as Celebi, Breloom, and other bird weak Pokemon are still in OU or BL.
>>22749208252 SpA Life Orb Serperior Leaf Storm vs. 252 HP / 4 SpD Clefable: 208-247 (52.7 - 62.6%) -- 99.6% chance to 2HKO after Leftovers recovery
Also, Unaware Clef takes hazard damage, so more often than not, it'll get killed by two Leaf Storms anyways, even with one CM.