Hi Robert, thanks for this feedback. We'd definitely like to add a KiCad plugin next. About 10% of our users use KiCad so it's definitely a community we want to focus on.

Over the past few months, we've made a lot of changes to how parts are linked. In addition to no longer showing related parts (this is where a lot of confusion was), we have also added notifications when a part hasn't yet been validated. As a startup, our team is constantly improving this too!

In terms of 3D models, you can toggle to the 3D model tab to see an example of the 3D models we're starting to incorporate. Example here: https://www.snapeda.com/parts/ATMEGA328P-AU/Atmel/view-part/ (toggle to the 3D view). These are currently a premium feature, but our goal is to make these also free at some point too.