All home page dashboards are currently not available in the new interface. In order to access a home page dashboard you will need to use the "Switch to Classic View" option on the top bar and then login back into the classic interface.
Risk chart portlets are available on the new dashboards however require additional functionality to be added in order to be complete. You will be able to see your old risk chart portlet by using the "Switch to Classic View" option on the top bar and then logging in to the classic interface.
Pie chart portlets are sometimes rendered too large for the portlet size. This results in a pie chart that is only being partially displayed. A refresh of the dashboard or portlet, or temporarily resizing the portlet in question will resolve this issue.
The "Migrate Form Data" button is not available in the new UI.