Your list is in horrible shape, it would take so much effort for Ross to build Carlton up.I think its unlikely but not impossible.
Pav and Sandi are nearing the end...and nothings impossible since we don't know much about Ross Lyons personal life. Maybe he'd rather live in Melbourne? Good friends with people at Carlton? Business opportunities? etc etc. He's already sprung a surprise while still in contract by jumping ship to Freo from Saints in the first place, so there is previous form.
I don't think it would take Carlton 5 years to play finals again with Ross at the helm. Reckon he could do a bit of Hinkley at PA magic and turn us around pretty quickly. Our list isn't that bad, players just look rubbish with the game plan and lack of effort.