Well there is an article about corruption by axleman who was tester and went to work for them. It explains the whole vanilla/ptw corruption and how RCP impacts it. In C3C the FP no longer acts like a second palace for ring placement and distance. The net effect is that you have a small reduction on towns near the FP and the FP does a fair reduction on the city it is in. This means in practice that you are usually not going to gain enough to wait and place it in some new land. It will take a long time to be built there without a leader and the city near it are likely to be not build up, unless it is a capture bunch. So most will just slap the FP up in a core town to get what they can as quick as they can. This usually means it will go up with no leader and not take 50 turns. AFAIK the only thing you can do to relocate it is to abandon the town. I guess you could let it be captured and then take it back. I am guessing the culture removing rule will have it destroyed, but I am not certain. I would expect that it not worth all that effort in any event. It would be easier to just move the palace, never one of my favs.