Sketching to the next level?

The thing that stands out to me is your ellipses.

I made these images a while back to show what happens when the ellipse moves away from your eyeline.
Image 01
Image 02

This image shows how the minor axis is always oriented. In most instances, the minor axis always goes to your VP.
Image 03

Just some objects made from ellipses.
Image 04

Hope these help.