Hey there :D

Lines:

Superimposed lines are good and confident, with little fraying, yes, but it's at the end of really long lines, but not in the beginning of any.

Ghosted lines are just great too, as well as planes - clean and accurate with no wobblinnes.

Ellipses:

Tables of ellipses are great, as well as ellipses in planes and funnels - even, smooth and fitting in the borders.

Boxes:

Rough perspective has no instruction mistakes, just inaccuracies expected by the course.

"Rotated boxes", as you mentioned, is looking a little weird but despite that is done very good.

And organic perspective is done just great.

I think you did a great job and can get to the next level :D