December is usually a month with little to no new releases. Sure, most people buy games to enjoy christmas holidays (kids, students), gifts, etc. By that time, many people have already spent money in games, gifts, christmas party, etc. So, in December there would be no competition, but it's a poor time for release. OTOH, it might be a time when people indulge themselves a little more and might impulse buy.
I really hope LS keeps the November release date. The game, according to them, is almost complete, all these extra months and funds was to add content and have more time for some extra polish. Also, the Dragon Commander team will be available to help soon.
I'll be disapointed if the game is delayed to 2014.