Hey, so previously we tended to discuss Atomic Host content changes on this list, but since then the https://pagure.io/atomic-wg/ tracker was created and has been used more. See https://pagure.io/atomic-wg/issue/315 for tuned.
See this PR for why the PR to add microcode_ctl was pushed: https://pagure.io/fedora-atomic/pull-request/77
