New Email Template Builder - Resize Report Widgets

I’m working on an internal email to send some reports to end users, and I’m using a KPI Widget as one of the reports.  When I do so, it looks odd because:

1. I’m only able to change the width of the report container and not the height.
2. I can’t put a border around the report.

Example of what I’m seeing:
 

I’ve changed the width down to 200 px to get it to look like that, but it still just looks odd just sitting there with the amount of space between the header and the percentage. 

Would like the option to be able to customize that container more in order to make this look a little better.