A move to December makes the most sense, probably Dec 4 or Dec11. Move In the Heart of the Sea to November, there is no reason that an drama should open by itself in December, its not a tentpole film. It really doesnt matter where you put it, the adult audience will find time to watch it, if they are interested.
if they want to completely kill Pan, then they'll push it all the way to February.
WB really needs to push back Midnight Special and Point Break, i dont think either of those films will succeed in those crowded dates.