Nice kit!
A couple of tips from me:

I've got 3 pole repair sleeves in the REI tent repair kit too. I've found that if I'll sharpen one edge with a file, I can use them as decent hole punchers (so, they are not a dead weight anymore ).

Add a medium size syringe needle to the sewing kit. It's extremely convenient for guiding of the sewing needle from an opposite side when repairing heavy duty fabrics, especially a heavy leather shoes, when you can not see what you are doing inside. It's better to dull its sharp point a little bit.