My humble guess is that there are some significant changes on the horizon for the KPA. Rather than have to re-work an editor (and the inherent issues of a first release) to accommodate a software release that has foundational changes, they've decided to wait until the software/firmware has stabilized with the new features and then release the editor.
As it is, they have to track changes in the Kemper and the Rig Manager. Adding a third "moving target" (the editor) would only increase support overhead and customer dissatisfaction.
Let's say, for argument's sake, that they announce a floorboard version (i.e. Helix). Any editor would have to support both hardware platforms. And, if they announce that, it would likely have a different processor, AD/DA, etc. to keep the chips from being obsoleted by the supplier into the future.
From conversations at NAMM 2016, I think many will be stunned at some of the things in the pipeline (the fertile mind of CK). I won't say more than that - not trying to be clever or exclusive, just wanting to be respectful of things said in confidence (and which may have changed drastically in the last 2-years).