I’ve settled with everything on medium (including textures, otherwise not enough RAM/VRAM in the device), + FSR2 on quality or balanced.
If you want the game to not be a judder-fest, though, you have to be using the Deck’s own framerate limiter. The game’s built-in limiter doesn’t help, even with triple buffering vsync. Thankfully it’s one of those games where input latency doesn’t matter anywhere near as much. 60 Hz, 30 fps cap.
No, hardware decoding of VP9 and AV1 works great on Chrome; I see it working with two Nvidia GPUs and a Radeon 780M