I played around with b2evo about a year ago and gave up due to navigation confusion. I kept getting lost. Just now playing around with it again and found the source of my confusion. It was the cascading menu changes which might not be the best way to describe it.
Cascading/stacked and hierarchical and I didn't realize that one affects the other from the top down I guess. Finding your way around a new admin area aka back office is always the first thing that people have to do when trying a new script. It really is a good navigation scheme. I just didn't 'get it' the first time testing the script.
What didn't click with me at the time is that if you're dealing with Collections and you're at Blog A >> Settings >> Plugins and click Blog B, you're still at Settings >> Plugins but for Blog B >> Settings >> Plugins, rather than Blog A.
I think it would be good to have a short video in Important Concepts(https://b2evolution.net/man/important-concepts/) showing the navigation scheme of b2evo Back Office