I'd offload/bring in;
Moore - Need someone better as back up (assuming Hendo returns). I'd look at someone like Marshall at Hull, who is experienced and maybe not too bothered about playing as often.
Freeman - Has been a great servant, but I feel that we need better competition now with Baldock. Connor Roberts at Swansea looks a good prospect, or Bogle at Derby.
Marvin Johnson - No description needed. Kelly at Bristol City has had a good season and could offer competition to Stevens.
Lundstram - Served his 'purpose'. Not sure what he can offer at all in the Prem. Swift at Reading could be a good understudy to Fleck.
Coutts - The saddest of all, but he just hasn't looked the same since his injury and I can't see him pushing on now. Probably needs games elsewhere to get back in it. Browne at Preston to deputise Norwood. Leroy Fer would be good too, for games where we need a bit more of a presence.
Dowell - Not sure I'd renew his loan. He's played a big part in our promotion and been a good loan signing. I'm just not sure if he can do it just yet in the Premier League. Lolley at Forest or Bowen at Hull (probably too expensive) are one of many I'd be looking at.
Hogan - As with Dowell really. Tammy Abraham on loan would be the top of my list, but that'd depend on Villa's situation next season, I suspect.
Madine - As with the other two January loans, done well, but feel the Championship is his level. McBurnie from Swansea would be my realistic pick.
I'd look to bring some CB cover in, in addition to the above - Reece James or someone of that ilk, in on loan.
Release - Jake Wright, Lafferty, Carruthers, Washington, Holmes, Thomas, Heneghan, Lavery.
That'd leave a squad of:
Gk - Henderson, Marshall, Eastwood
RWB - Baldock, Roberts
RCB - James, Basham, Crainie
CB - Egan, Stearman
LCB - JOC, Bryan
LWB - Stevens, Kelly
CM - Norwood, Browne, Fer
CM - Fleck, Swift
AM - Lolley/Bowen, Duffy
FW - Sharp, Abraham
FW - McGoldrick, McBurnie
That's 25 and then look to pick up a couple under 21 - another striker as back up and another centre mid as cover (Connell at Bolton?).