Hello Caden.
There are plans to release connectivity add-ons for Kinetis SDK to enable 802.15.4-based connectivity for Kinetis W devices in Q3 2015. The KSDK-based connectivity enablement will move away from the classic BeeKit model and will be closer to the look and feel of the KSDK itself.
There is already an 802.15.4 software package for the MCR20A 802.15.4 wireless transceiver combined with the Kinetis KL46Z and the KL64F microcontrollers, which is an add-on for Kinetis SDK v1.1 and which you can refer to get a better understanding on how the Kinetis W (MKW24. MKW21 etc.) enablement will look like. You can visit the MCR20A webpage for downloading this software package: http://www.freescale.com/mcr20a .
I hope this helps.
Regards,
Tudor