I've only just started jumping myself so I'm probably not the best person to critique a jumping position but i'll give it a shot, I'm in training to be an instructor
Comparing the pictures it looks like your lower leg security has improved a lot, but it does still look slightly behind where it should be. Maybe that's due to some pivoting on the knee? I have that problem and my instructor is always going on at me for it
Really come off your knee and allow your lower leg to become the anchor, not the knee.
Your hands look like they have dropped a little too low in the last picture, but you did say he was starting to unfold, so maybe that's why? They are in a much better position in the earlier 2 photos.
P.S well done for always looking up and ahead, I have the bad habit of looking down!