Nigel Clough has admitted it was a tough decision to allow Jason Holt to leave Bramall Lane after a successful loan spell during the second-half of the 2014/15 campaign.
The 22-year-old joined the Blades on-loan from Hearts for the remainder of the season in January with the view to a permanent move in the summer and impressed, scoring five times in 17 appearances.
But on reflecting why United didn't take up the option to sign Holt on a full-time basis, Clough remarked: "We'd have loved to have kept Jason, but we thought he was just too similar to Stefan Scougall who we have under contract.
"We brought Jason in because Stefan had a few knocks and niggles and for him to score the amount of goals he did from midfield excellent.
"Jason did brilliantly for us but we just need a different kind of player next season, we need more of a physical presence because when Chris Basham has played there he has done ever so well and shown what a quality player he is."
The Blades boss also hopes to see James Wallace be a big part of his plans next term after an injury plague first season at Bramall Lane.
Clough added: "James was as big a miss as anyone. When we drew-up our list, last summer, no disrespect to anyone else but he was right up there at the top.
"Hopefully with a full pre-season under his belt he will go on to be a regular in our side next season, he will be like a new signing in many respects."