Ronan won't be coming back to us and I doubt he'll be coming back to Scotland either. Outwith the Old Scum the only clubs who have paid in excess of a £500k fee in recent years have been Aberdeen and Hibs. Both can currently afford that but I doubt he will agree to go.
He'll want to prove himself at a higher level and, much as we don't like to admit it, playing in the English Championship would be a step up, not to mention a 5 figure/week wage.