The other likely possibility is the gondola, according to the maps people have come up with based on the permits, will pass close to the backside of France. I'm assuming Disney wants to finish the gondola construction, in that area, before beginning on Ratatouille. So it could be an order of operations delay. Or work could be scheduled to coincide where practical, so that construction equipment is back there all at once. But with 2 projects in the same area, timing comes in to play one way or another.