Time estimation - original vs remaining estimate

Feedback from one of our users:

I've been looking at the time estimates and it seems that the "Time Estimates" column in Portfolio maps to the remaining estimates at the story level. It's great how Portfolio:
a. Calculates the remaining estimates and adds them to view at the Epic level and it
b. Allows you to add additional estimates at the Epic level too
However, it would be brilliant if it could:
1. Show the Original Estimate and allow it to be added / removed on the column view
2. Show the Work Logged and allow this field to be added / removed onthe column view
3. Rename the existing Time Estimates column header to Remaining so it more clearly maps to the JIRA ticket information itself (took me a while to figure out what it was doing...)