Personally, I would really like to see Valve add a video capture feature. Like how on Xbox and PlayStation, you can press a button to record the last 30 seconds of gameplay. Something like this is almost impossible to do conviently on Steam Deck and just Linux systems in general. Valve adding it in natively to the Steam UI would be absolutely amazing.
Anyway, what features or improvements would you like to see on Steam Deck?
Probably an easier setup for LAN gaming. It would be nice to be able to toggle between host and client from Steam’s game mode.
I know a lot of games these days don’t have LAN support but it could be useful for retro games, emulation, and it might encourage new devs to work in some sort of LAN mode. Maybe it could be added to a games compatibility score but not actually weighted one way or the other