The staff can still use their phone features to eliminate sound at 5 am.
The gist of the complaint was that the recipients were disturbed at what was for them an ungodly hour.
We don't know if she went over heads she should have consulted first. We don't know if her emails were ideas she was throwing out or items she was confirming after consultation. We don't know if the emails were about last minute things that couldn't wait until the next household meeting, or whether they were items she wanted included in a daily meeting or one that was held more frequently (a possibility in the runup to the wedding). We don't know if she was emailing the wrong person.
I suspect we are talking about people who either didn't understand that the email was parked at 5 am and didn't need a response until business hours, or people who are annoyed at little details that they wouldn't mind at all if it was someone else (someone English, and well established in the RF) doing it, or people simply using small details to feed an image to a press they know will eagerly lap it up.