I would really like to see an Eliptical radius option added to the fillet tool. The user would have two dimensions to enter for the elipse, and x and a y to define the lenght and height of the radius of the elipse.
As an example I am designing a project that has a solar panel, the panel is epoxy coated. It does not have a constant radius, rather one that tapers. In the previus software I used (Form-Z) this is what I would have used to create the Solar panel. This would be a super addition to the fillet tool and provide users with some great additionl flexability.