Chris Wilder has been talking to the media about the transfer window business at Bramall Lane.
United have brought in Ryan Leonard, Lee Evans and Ricky Holmes permanently and James Wilson on loan. On the flip side, a number of Blades players are available for loan and Cameron Carter-Vickers has returned to Tottenham Hotspur after a loan spell.
On CCV, Wilder commented: "We've got a fantastic relationship with Spurs and I've always said I will be up front and honest with parent clubs.
"Cam has been a 19-year-old who has done outstandingly well for us, he's had rocky moments, which is the norm for a young player, but with the form of Chris Basham and the signing of Ryan Leonard, I struggle to see Cam getting in on a regular basis and it is not fair to stockpile players."
The United chief added: "We've worked tirelessly to get players in - the business we have done can't have gone any better. Big credit needs to go to Paul Mitchell (head of recruitment) and Carl Shieber (head of football admin).
"We are playing in a competitive environment, we need to be flexible and are creating balance and competition in the squad. We are now looking at a squad with depth and balance."