I’m surprised that things have to be so black and white with some of the people with which I have had this discussion. “If he is scoring goals then he plays, otherwise sell him” seems to be a regular theme.
Why not just drop the kid to the bench, tell him it is down to him to work hard to win his place back; and ultimately to keep that place.
If he fails to do this and is unhappy with the situation then maybe selling him is best for all involved. I personally would be very happy to have a player like Webber to come on for the last 30 mins, and if he is firing on all cylinders I have no problem with him starting.
I still think he can do it at this level, I also think he should be dropped but I hope he remains a blades player until the end of this season at least.