Look at someone like Andros Townsend, the lad has been on loan about 10 times over the space of 3 or 4 seasons before making an impact with Spurs this year, just because a player isn't showing an immediate ability to be a first team regular at the age of 18 doesn't mean they aren't worth persevering with. I wouldn't say that when Campbell has had first team opportunities that he's looked totally out of place, he's not ready yet but what 18 year olds are? Just because he's not showing Wayne Rooney type ability at this age doesn't mean we should discard him as a waste of time, money and coaching resources.