This probably isn’t what you want to hear but you can make a really really great split setup using SteamInput. The only reason I haven’t used it for the final game is because I play a lot on desktop, not just Deck and I don’t have a steam controller. But on Deck with its trackpads I can access most of the UI and still have the trackpads for selecting items and combat. I guess the only big thing you can’t do is move the party with the left stick, but they didn’t bother me too much. I think I might prefer it to either purely kb/m or controller setups.