From what I've experienced, kyruem is mainly used to stall. Seeing as how OU is more offensively oriented and hail is rarely used, kyruem isn't going to be used that often. Out of all the BL pokes, gothitelle and wobbuffet are the most used seeing as how they perform niche roles on weather teams. Kyruem is good if used correctly, but I've found him to a typical BL poke. Now for the actual stats, UU looks great. HO is viable with tornadus setting up rain and spamming hurricane. Virizion will be fun to play with seeing as how unpredictable it can be. Mew is back, but I haven't seen any yet. Mealotta is a dangerous poke, but I'm sure UU will be able to handle it. Sad that stoutland fell. =( I bet he'll be back in UU soon unless he gets banned to BL2.