https://forums.plex.tv/discussion/comment/1191463/#Comment_1191463
A long awaited bug fix was included at the bottom (it has worked on the mobile app forever, but was broken on Android TV)
- [Android TV] Play from Show/Season page should start from first unwatched episode.
They also added a setting to play next, similar to how Netflix has it implemented. The UI shows a small picture in the bottom left of the current video, and next to it a larger picture of the next video with a 10 second countdown and episode synopsis to the right. My favorite part is that this takes effect even when playing from the "On Deck" bar.
This is not toggled on by default though. You need to toggle it in the settings.
I just want YouTube style 30 second skips with the dpad. Settings 128x and stopping it 3 seconds later to jump a few minutes is for the birds.