Given that the bulk of the CW 10.3 product is more or less platform agnostic (that is, the IDE itself (Eclipse) is written in Java and the compilers should be platform-independent), most of the improvements for "overall functionality" would also improve the experience under Linux.
What, then, would be platform specific? I can think of only two:
- Debug/Trace pod drivers
- Copy protection
Of course, Freescale would have additional testing requirements for the Linux version, but it's not as if they were doing a great job with this anyway (on Linux or Windows), judging by the number of bugs we reported the last time we used CW and MQX on a project.