Pawmot was originally in ou due to revival Blessing, however, players decided that pawmot was not worth running for revival Blessing because pawmot is not a great Pokemon , so it dropped to uu, and after home update (I don't know if it dropped before) it dropped to ru, plus power creep was bad this gen, even weavile, one of the best ou mons from last gen is in ru.
So on paper, pawmot is good, but in practice, it sucks.