In many ways Ottoman conquest was beneficial to the city itself. By 1453, the city was only a shadow of its former glory. In Ottoman hands, it got back some of the prestige and glory associated with it. It was again in the hands of an organized and efficient empire. It could never achieve the status it had in the early middle ages. It was not even dominant trading hub in the Mediterranean and trade were slowly moving to the Atlantic...

For what it's worth, I think the Ottomans did everything they could to restore the city...