Did you know that there are 27 usable Pokemon that have access to both Stealth Rock and Roar for the purpose of phasing out setup sweepers? And out of all of those Pokemon, only 2 aren't hit super effectively by a standard Pheromosa's moveset (fight STAB, bug STAB, ice meme). Those Pokemon are Camerupt and Swampert, who still don't have that much bulk to begin with and who's mega stones are unreleased.

WHY ISN'T PHEROMOSA BANNED YET?