So the AMT vuln was related to a lack of security on their web service? Somehow this does not increase my confidence in the rest of their code - if they didn't get this right, what else is wrong?
The Intel note mentioned a local vulnerability that allowed local non root users to provision AMT as well. That sounds like at least one more, different, issue.
That's more of an argument about inauditable, non-disableable, hostile (the CPU shuts itself off if you blank out the appropriate data structures) code running below ring 0