I've noticed this countless times watching TUF and even on some of the UFC fight cards... A guy has the back of his opponent with hooks in, however, the legs are crossed. Never have I seen someone exploit this immediately by crossing their own legs over the hooks and pushing the hips forward. That is a nasty leglock. Only thing I can think of is maybe lack of experience. Or, are more of the upcoming fighters just doing more and more conditioning while sacrificing skill training? I guess something has to give when there are only so many hours in the day.