If it can be done via RSS, then an *arr tool can be developed. I tend to grab releases that seem interesting (then buy the full game if I like it), but rarely install all of them. I’m more interested in the organization of the .zip/.iso I have laying in a folder, knowing what I have and what I should snatch.
Yeah, I guess what I would love are separate features, that are more than likely already done by existing tools/platforms:
a GUI to list locally available content, with clean cards, metadata, community ratings and reviews (like it’s done on IGDB.com or HowLongToBeat.com)
a GUI to organise ALL content (locally available and not-locally available) it into custom lists (like it’s done on HowLongToBeat.com or Steam)
a GUI to browse gamelists and show availability on configured sources (stores, greystores, torrent, usenet) (like its done in Radarr/Sonarr)