KC Royal he would also possibly have been in the side when they won the cup a couple of months back.
It's a step up in intensity, pressure and the preperation that comes with being involved in the first team of a club. I imagine that there were also more fixtures for Oxford than our U21s so it's all about having exposure to, and seeing how they deal with, the pressure and routine of being a first team player.
He'd also have been one injury or red card away from getting games as well.
He might not be good enough to make it, only time will tell, but the logic behind his loans is pretty sound.