The loans system is a bit weird like that:
Bree & Charles played great on loan, played great with us
Ronnie Edwards played great on loan, not so much with us
Bragg - not great at Crawley, doing great so far
I think it must really depend on the circumstances of the player and the destination club. So many ways it can not be a great fit. Having someone who can consistently get young players loaned to the right clubs would be a considerable financial advantage to the club in the long run.