I personally agree Piecharts are often the best way to illustrate metrics in an easy to assess way. That being said, I don’t know of their plans to but there are a couple of things you can do on your end in the interim.
Graphly, I believe, has this option still. They have a free version and it can be setup to run from your dashboard (not in CB but it’s still helpful to have when you log in)
To formerly request feature changes or improvements, try submitting your request at https://infusionsoft.com/tellus. The more requests for a feature they get, the more likely it is to climb the production ladder.