Is it tomorrow enough yet ;~p
I'd enthusiastically support Kael as new Producer. As far as I am concerned (and from my limited perspective) he has demonstrated the requisite skill set for this particular job. Chief among those skills being of team leadership and project management. As well, he has shown enthusiasm and creative ability within the TBS and Fantasy genres (I find this as important as the rest). He has shown he has the gumption to stick with something over the long haul. And he has demonstrated ingenuity to tweak code and design, to achieve a desired result. He started with a story, got a team together, taught himself to code, tweaked the code and balanced the design to create a compelling game with loads of replayabilty. And while doing that, he designed the mod such that it was exceedingly mod friendly. Furthermore he does have professional experience in the field having been paid as Lead Designer on the standalone FfH game. And I'd be surprised if he doesn't have applicable leadership and management experience from his previous career.
So yeah, I think Kael would be great for the job. Jon Shafer rose from the mod ranks to lead the design of Civ5. I think Kael is just as worthy and skilled to lead the continued production of EWoM ++.
PS: And I am glad to read that Brad will still be deeply involved with design and AI.