It is my humble opinion that meeples can only be deployed to incomplete features. The answer from HiG regarding meeple deployment during final scoring is a little confusing.
Beginning with the player on the left of the 'trigger' player, each player redeploys one of his or her followers from the city of Carcassonne to an appropriate feature on the board. Followers can also be redployed to incomplete roads, cities, cloisters or farms, since these will also be scored at the end of the game.
It can be interpreted that meeples can be deployed to ANY feature, but I think that wasn't the intention. I think the first sentence was supposed to be in reference to the last tile played, not the entire board in general. This is the second time this has come up, and I think we need to get it resolved with HiG.
Tiberius