It's no surprise to see Crobat #50 in OU usage. More and more people see how it fares - much better than what they think imo.
Anyway, one of the most exciting things about these is actually the peak of usage in UU - 5 Pokemon so neck-to-neck and ever changing. Roserade dropped from #1 to #4 for example.
In Ubers lead stats, Deo-e and Deo-f are ever changing as well, and it looks like Deo-e won't drop again.