It is more reasonable to always give the real name, optionally followed by an email, that to consider that the real name is a mere comment for the email address.
Not necessarily -- it depends on your point of view.
An email address may change over time, but one's name do not change often. In a lifetime of maintenance, I saw email addresses of a lot of correspondents fluctuate more or less over time. Only two or three persons asked me to correct their name after they got it legalistically modified.
The contact point for a PEP is really a given human, whatever his/her email address may currently be. The modern Internet usage is to write the name first, and the email address after, between angular brackets. So, I'm suggesting that the PEP documents the popular, modern usage.
I've always thought of the "To:" line as an address, not a salutation.
It is dual. The human reads the civil name, the machine reads the email address. Many MUA's have limited space for the message summaries, and they favour the civil name over the email address in the listings.