Yeah, 2015 > 2014 is a given now. All that the Wii U had left in 2014 from now on was Bayonetta 2, Fatal Frame V, Super Smash Bros. U, Taiko Drum Master and Captain Toad. Bayo 2 and FFV both provided very small boosts (like, 1k each, and the Wii U was still under 10k in those weeks), Taiko did nothing and Captain Toad/Smash provided fairly okay boosts.
In contrast, the Wii U still has Splatoon momentum (which has kept it above 10k), Super Mario Maker + bundle, Star Fox Zero, Taiko Drum Master, Genei Ibun Roku #FE, Animal Crossing Amiibo Festival, Mario Tennis: Ultra Smash and maybe Yokai Dance if Level-5 is feeling generous. All of which, aside from Taiko and Mario Tennis, I can see providing substantial boosts. And this is without considering the possibility for a temporary price drop or value bundle like they did in 2013.
The battle against 2013 should be fairly easy until late November/early December, where the console really started to hit its stride due to Super Mario 3D World and the Wii Party U bundle.
Edit: I'm also wondering if Project Treasure might get a retail release in Japan, as Dragon's Dogma Online did. That would be a nice surprise.
