Could changes be coming?

The Leafs have called up Kronwall and Tlusty for the start of their road trip. Is this a sign that changes could be coming to the D. With Colaiacovo due back soon, Stralman now up and now Kronwall also called up, is this Maurice sending a message or are changes in the making? Harrison has also shown alot of grit with the Marlies, is he next? At forward Wellwood and Mark Bell are due back and with the call up of Tlusty, I would say that 2 forwards are on their way out. Again is this just Maurice sending a message or are changes coming up front as well? I would say that Ferguson and Maurice will do just about anything to save their jobs, so yes I expect changes to be made.