I'll separate my critique in sections:

Lines

Super imposed lines have some common errors for the first page, fraying towards the end, but you really picked up on it on the second page. Very well done. Also, the curved lines are drawn way more confidently, which is always a plus. Your ghosted lines are well drawn, alongside your chosted planes, just a few mistakes here and there, but once again, well done!

Ellipses

Here, you did a great job, your ellipses are clean, drawn twice everywhere, the planes in the panel are drawn very snuggly inside. Only one I can see that is going outside, and very few that are too small. Your funnels are well drawn as well, just a few of them seem to not be separated on the middle.

Boxes

Very well done here as well. The Rough Perspective is just a little off on a few lines, but they are very good nonetheless. Hope that drawing the red lines has helped you see the problem. Rotated Boxes, well done as well, you have a great sense of space. The cross hatching is great as well. The Organic perspective is very great. Not seeing major problems here.

Overall

Fantastic work! Some Ghosted lines exercises should help you on your journey, but other than that, you can continue on the next challenge! Just remember the 50/50 rule, and ask if you need some pointers or help.