Ronald Reagan used recess appointments 232 times. W. Bush 171 times. Clinton 139 times. Obama 32.
Supreme Court Narrows President's Recess-Appointment Powers - WSJ
Gosh, what changed there? GOP decided to act like children and deny Obama the right exercised routinely while their guy was in charge. Sure, the GOP CAN do it, but clearly they've abused the process. That's the point.