Lines: In the ghosted lines and ghosted planes exercises, your execution improves but there's still some wobbling and curving. The curving may be due to the pivot of the elbow, which means a) you have to make sure to draw from the shoulder and b) consciously curve in the other direction to compensate. Additionally, make sure you focus on making deliberate, confident marks over hitting the target, since jerking at the last second can also cause curving.

Ellipses: your ellipses in the table of ellipses are a little wobbly or "dented" I think if you make sure to ghost multiple times until you reach a certain level of confidence with the path of the line, that will make the ellipses more confident. Making sure to draw from the shoulder and not from the wrist or elbow, including for smaller ellipses, may also help. Other than that, you're going over each ellipse twice and aiming for a snug spacing, which is good.

Perspective: In the rough perspective exercise, make sure the back face is rectangular. Ghosting the verticals and horizontals to while figuring out the back face may help you align those points. Overall you seem to be understand the principles of perspective correctly. Nice job with consistent spacing on the rotated boxes exercise.

Overall, you improved a lot with mark making and you understand perspective well. I think it'd be good to revise the ghosted lines exercise to confirm that you understand the mark making principles (ghosting, drawing from the shoulder, confident lines). Also I think it'd be good to revise the table of ellipses. Make sure to ghost and use your shoulder even on the smaller ellipses.