Hi Jekettex, as you know I just posted Lesson 1 for review so don't know if my advices would plenty help you, anyway, there what i though on your work:

LINES:

As far as i can see i think you did a good job there, on superimposed lines pretty much all start from similar points, letting know that you take you're time to prepare each line, on the ghosted lines and planes i just see one or two wobbly lines, i think as a start it's a good job, the only thing i would critic is the accurate of some lines, but, i think that would come with experience, so, well done.

Ellipses:

Not much to say here, your ellipses seems fare enough confident. I can tell you had some struggles making them reaching their boundaries but, again, it's a fare enough good for starting. On Funnels you could change more the degree by making little axis bigger on the last ellipses, but since that was an optional task I won't say that you should repeat it

Boxes

The plotted perspective is well done, nothing to say, but, the rough perspective have some issues on how the perspective change the lines, i can see that you draw some 90° degrees angles and that make some boxes seem out of perspective compared to other that you done great. Try to ghost the lines of your boxes all the way to the vanishing point, that did it for me.

On rotated boxes and organic perspective you did a great job rotating each box, but you imposed some lines (specially on organic perspective) so try to do only one line, even if it gets wrong, that would help you with accuracy and smoothness.

Hoping to be helpful,

Pakas342