As you already know, a bug in Intel Active Management Technology that makes possible a remote privilege escalation has just been confirmed . I know that you're already thinking about releasing your Platform Security Processor's code to the Libreboot/Coreboot community. I'm no marketing expert, but I strongly believe that this is the best time to do do that. If you at least take a decision and officially announce that you will do so in the near future, it would be a huge news and would be amplified by the fact that all security specialists are currently writing about that bug and would propose AMD as a secure alternative. Don't wait until the same happens to you! Carpe Diem!
In light of the recent Intel-ME-holes and the growing public awareness of this issue we can't stress hard enough that having the code open sourced or even better have an easy off-switch would be a huge publicity boost.
At the moment, while i'd prefer to buy a ryzen CPU, i'm pondering to choose intel just because me_cleaner provides a way to disable this security-nightmare...