All great feature requests and will be implemented one day (if I don't get hit by a bus). Linking up the board preview with the parts list, to help soldering and debugging, has been on the roadmap for Kitspace for quite a while. Here is a badly collaged concept drawing of that idea: https://github.com/monostable/kitspace/blob/bf017e245ed92066...

If you click on the "repo" link for most (not all) projects you will be able to download schematics (the majority are done in KiCad).