> 1. For an auto renewal for the current managed domain, will I have to
> manually restart each time?
Clarification: only a reload (graceful) is necessary, not stop+start.
Since the renewal is done usually a month in advance, you have plenty of time. My debian systemd controlled apache is restarted gracefully each day anyway, for example.
> 3. According to my reading of the docs, using OCSP via mod_md looks to
> be the best practice. Am I correct?
It is designed to be more reliable and also offers monitoring. But it is a new thing and bugs may be found.