Rumours are that Mackay-Steven is the number 1 target to replace McGinn and Craig Bryson to replace Jack. Although derek has said he hopes to have a couple more players tied up before the end of the season on pre contracts.
Can see Mackay-Steven happening.
Bryson has made 30odd appearances this season, including starting both games since Rowett took over. Can't see them letting him go, and if they did, he'd probably get another gig down south on more money than we could pay.