the OU-UU cutoff isn't by rank, it's by usage percentage. Those Pokemon are not Overused. Hence, they're welcome in UU.
Oh, I see. Well my point still stands as percentage cut off could be reduced from what I assume is 3.25% to a range between 2.75% and 3.00% to keep all 3 of those shell smashers and hippopatas sand abuse out of lc uu. It's merely a suggestion to make the tier more enjoyable. Certain things such as ferroseed, chinchou, cottonee, sash abra, and powerful priority attacks are hindering the smashers in LC but most counters are just gone and it affects teambuilding to the point of using stuff like purloin just as smash fodder to get a t-wave up or encore in. Also scarf elekid is becoming a thing purely for the sake of outspeeding smashers. I guess sash solosis with energy ball deserves a mention as poor mans abra.