That sounds like a decent tool, and I have to concede with your experience it must be far superior. I just did a repository search for both and neither appear to be simple apt-get install, so if someone wants to get up and running fast, it's an option. I've seen someone running KiCad with the shortcut keys and they breezed though. I've only been using it for two days and done a couple of circuits, and this is how easy I can use it after two days.
I think you are right, if someone wants to spend the time getting to run Eagle on Raspberry Pi it would probably be better. It was posted here because I am doing a series of work specifically on the Raspberry Pi, rather running on MacOS or Windows.