2014 Cu 24 has square-shaped bobbins that are designed to be almost 100% fitted with the pickup cavities on the guitar. My 2013 model also has the same bobbins and I think putting covers on the pickups needs further modifications be it widening the body cavities or even re-shaping the bobbin edges.
For the tonal affections, take a look at this clip. The guitar in the video has 59/09 pickups, the same model featured stock in 2014 Cu24. As the result there are obvious chages to the tones. Please note that the 59/09 pups in the video are the early version that are wound in basic, non square-bobbin-shaped so they can be covered with ease just like in the StewMac video.