SF User profile tokens for MSI emails

It would be awesome to have SF user profile information available as tokens for MSI emails. This would allow us to dynamically populate a signature based on who is sending the email, the same way SF templates do.

Many sales teams have multiple sales reps that handle a single lead/contact, so using the Lead Owner/Contact Owner, or any other custom field that contains a point of contact, doesn't provide a fail-safe way of populating a signature in MSI emails.