This has been implemented with the UNO UI.
After all the heated discussions when the Discovery hubs were introduced on the Roku app, and everybody wanted to turn it off so the app would go straight to ‘Browse all,’ I just realized that nobody ever made an actual feature request for it. At least I can’t find one.
So here it is:
Please add an option to disable the Discovery pages. Many users find them useless and irritating, and would prefer to go straight to the Browse All page when opening a Library.