I'm pretty happy with the state of the OS and GUI as it is right now. Just moved a couple of things around, basically.
I do have a problem with Flathub, though - in theory, it's great. But I'm going to be playing games on this PC and Flathub causes MASSIVE problems for Steam and Heroic Launcher, their libraries and Proton compatibility. Love the idea, don't like the execution.
Garuda (or maybe it's an Arch thing?) does a phenomenal thing with AppImage files - when I launched the first one it asked me if I want to add shortcuts to Application Laucher and tuck the AppImage away in a safe spot, so that it doesn't sit in Downloads. LOVE that feature.
I have two NVMe drives - 1TB and 2TB. I keep the OS and "regular apps" on the first one, games go on the second one. Moving the libraries was DIFFICULT on Flatpak. Had to use external software (Flatsomething, can't remember right now) to give permissions and even then, for some reason, sometimes installation would just fail with a "drive error". Oh, and I had to search online to provide the appropriate Steam path for Heroic because, by default, it doesn't see Flatpak Steam.