Bought 14 RMK new, second season, had also bought an 11 pro new.
I had the longer fox evol R's that I moved from the 11 to the 14, along with other mods, and I wanted the cooler and none of the 13 issues with QD, driveshafts, carbon tubes, and glued a-arms. I have zero regrets keeping the chaincase, absolutely none, but I also wanted the chance to gear it down from stock. Not taking shots at those with QD, it's worked great for many. I can't tell the difference between them, besides the sound. I do think the +13 QD chassis handled differently, but I think it's shorter front shocks and skid differences. My float setup changes all that anyways. No regrets. FWIW.