Placeholders for email addresses hold a string like so: John Doe <john@example.org>
The expected behaviour for them would be to only hold the email address like so: john@example.org - which would also allow for increased flexibility.

The use case I experience is generating a string that will be recognised by the textile parser of our project management tool (Redmine; see http://redmine.org) by formatting like so:
"%OFROMNAME":mailto:%OFROMADDR wrote:
- this would be displayed as 'John Doe wrote:' where "John Doe" is clickable in Redmine.

Getting the old variant (John Doe <john@example.org>) would still be possible easily with this:
%OFROMNAME <%OFROMADDR>

The affected placeholders are:
%TOADDR
%CCADDR
%FROMADDR

%OTOADDR
%OCCADDR
%OFROMADDR
%OADDRESSEESADDR