I have read your post.
The issue with the McAfee Engine Server taking up more CPU is an ongoing issue with the McAfee software.
McAfee Engineers are working on it. The McAfee SaaS Endpoint Service version 5.2 that is going to be released by the end of this month is expected to resolve this issue completely.
Please wait for the upgrade that will happen at the end of this month, this will resolve the issue that you are facing completely.
Please bear with us and we apologize for the inconvenience caused.