I Know that now its not a best time to ask this kind of changes, ST is preparing the lunch of version 16, but i would like to see in roadmap.
This week i was working with Exim from cpanel and saw that they can do SNI in email services (POP/IMAP/SMTP), witch is very good to host different SSL/hosts communications in the same IP.
I like to propose to everyone to push this idea so we can have more clients using SSL with the need to bind a dedicates IP. (Witch dont work very well because the autodiscovery configuration).
We need this kind of enterprise solution for bigger clients and to promote the SSL use. We have lots of stolen password because users dont use SSL, and the bigger clients want a vanity configuration.