Support for ultra-widescreen resolutions have just been added to the game!
I opted to go the route of extending the WorkSpace (main gameplay) area, which technically is a nerf for those in ultra-wide resolutions (as it decreases the task density), however it does make the most of the available play space and feels like the most "ultra-widey" experience.
Behold, glorious 2.388 (repeating of course) : 1 aspect ratio
Compared to standard widescreen aspect