Saw a few old posts about removing shift knobs. The shift knob for the 2011 (and up) is pretty easy. Using a trim tool or flathead screwdriver, insert between the lower assembly and knob to separate. This will take a good bit of pressure. I would definitely recommend a trim tool as a flathead will probably gouge up the plastic of the lower bezel. Once the bottom is separated, just pull up on the knob and it slides right off. There are no threads on the shift lever so if you're planning to use an odd piece/part for your shift knob you may have to do some creative thinking.
Here are some pics.