Sound mixing is just all over the place where I can't reliably keep the sound at a single reasonable level, so I turn on subtitles and keep the volume lower so I don't wake the entire house when there's an action scene.
It's more for people who look at the controller buttons while playing. I've had people use my controllers and get really confused when B is actually A and so on.
As someone who switches between PC using an Xbox layout and a Switch, I like the idea of swappable buttons, assuming it doesn't cause any issues physically with the controller in the long run.
Your dock won't work, as its most likely HDMI out only (not in).
Even a lot of the capture cards that do have HDMI in tend to have a lot of delay, same with a lot apps that would encode a signal over USB, which would also have a performance hit on your Steamdeck as well. I unfortunately can't think of a good solution except maybe upgrading your wifi access point and using a wired network connection with your Steamdeck, but by then you mind as well just buy an external USB-C display.
I hope they update some of the original Ultimate 1 controllers for support. I love 8bitdo controllers, but I'm not going to buy a controller over it, and I constantly have had issues with my SN30 Pro buttons sticking.
Maybe it's just the games I've been playing (mainly Mario Kart and TOTK), but I havent really had any issues with the Switch 2 screen, and I'm usually pretty sensitive to that stuff, at least on PC.
Man people suck :(