There’s two feature suggestions covering what you’re describing in #1:
- Hide watched items from recently added → Show Only Unwatched in "Recently Added" - #2 by Behold
- option to hide watched items from all home hubs → FEATURE REQUEST: Provide a Setting to hide Watched content on the Home Screen
I suggest you comment/vote in those threads in order to avoid distracting votes (considering #1 to be a duplicate)
With regards to #2: I don’t have the exact filter criteria for the Top Unplayed hub. You can easily create your own ones using a smart collection and publishing that to the Home Screen…
https://support.plex.tv/articles/publishing-collections/
