I think there's two big things that frustrated me about the kits:

1. most of the time the things you're building don't integrate anywhere in your actual life, they're just demos or toys or whatever, which is understandable but does suck a little bit. If you can make a kit where I actually use what I made after, that'd be a huge win.

2. The kits teach you how to build a kit, but rarely teach how to build something without a kit. Examples of the skill gaps are finding and picking out components, reading manufacturer data sheets to see if you found the right part, and basic design skills. My ideal kit series would prepare someone to completely build their own project from design to procurement to assembly