Code review comment for lp:~mvo/ubuntu/wily/initramfs-tools-ubuntu-core/new

One concern here is that your / is now effectively backed by a read-write filesystem which you can't unmount, so that may well lead to dataloss unless your shutdown sequence has extra logic to remount every layer read-only properly, killing any task with r/w fds open and only then shutdown.

If you can confirm that your shutdown sequence succeeds at remounting everything read-only prior to system shutdown, then except for the few things I listed in-line, this should be fine.