If it were me, I would be doing everything in my power to get this mod ready for release for Jan 2015, or if is the case, delay it until then.
With the high profile release of the new Assassins Creed game on November 31st, the time period is probably never going to see more interest. People will probably play AC5 solid for 2-3 weeks, but start to get bored of the same game mechanics. After then, searches for "Napoleonic Games" or "Games about Napoleonic War" are going to be an all time high which means more exposure for what looks to be a masterpiece of a mod.
By the end of December, the gaming press will have stopped the previews and reviews of AC5, but the high interest in the game will mean that you can see a journalist picking up on the mod as a sort of "Loved Assassins Creed? Try This" feature.
If the mod is half as good as it looks to be, all the attention will be well deserved.