The developers have a standalone "lite" version of the game that apparently runs much better on the Deck's hardware. However it's not available through steam, you instead have to install the launcher directly from their website.
When the devs say they plan to improve deck support, I wonder if they're just going to make the lite version available on Steam, or port over some of the optimizations from it.










We've discussed ARM hardware for a future deck a few times here, ever since we learned that valve was working on an ARM compatibility layer.
It seems obvious for a handheld since ARM devices are usually much more battery friendly than x86 devices, but I've been told that we won't see any actual hardware advantages from x86 games running through the compatibility layer. Games that have a native ARM version will perform better, but the FEX layer is just about ensuring backwards compatibility and won't actually unlock any hardware improvements for pre-existing x86 games.