I just bought a bundle that automatically added a 1000+ games to my "Things you own" list. Previously it was possible to hand curate this list by manually claiming games from purchased bundles, but since that didn't happen here it has rendered my library basically unusable for simple browsing. I pretty much have to switch to using only Collections now.
I would very much like the ability to hide unwanted games or perhaps even to unclaim them in bulk (though they should still remain available through the bundle purchase in that case). Also the library really really needs a Search by Name option, and sort by tags and price.
Basically, please just add all the filters from randombundlegame and maybe look at Steam and GOG Galaxy or Playnite for ideas. That, and hiding or removing games.