While I find some of Duelle's ideas interesting, I honestly don't see any need to change anything about the way TP work.
It works just fine, it gets the job done, isn't too invasive on the gameplay (like, for example, the stamina bar in early 1.x was) but still works as a limiting factor.

I just don't see any reason to spend resources and development time on a system that isn't broken (and, quite possibly, actually DO break it in the process)