Well said. Plex was great when I started it (I was using another client and late to adopt Plex) because after basic setup on the server everything worked very nicely on the roku devices, and worked great, until the last update. I tried Emby, as it is a lot closer to how Plex used to operate, but they go too far the other way - looks extremely bland with the basic UI through the Ruku and I don't really want to have to take the time to customize it.
The major issue I have with the current Plex UI is that it ignores folders - so if you had your shows sorted by folders, forget about finding them (or a specific season of them) through the folder like you could before. They also moved lots of functionality to other places (for example, some options in a tv series can now only be found when you are plaxing the episode, and some functionality has been moved to a down arrow.
I would say it's more equivalent to Windows 8 than Windows 10 - everything is there, but they moved way too many things at one time to make reasinable sense to most people.