Well, ok, rhubarb works for linux, they just don't mention that in their README.md. That's good. I tried it out. It works... but I think I'll still invest some time in trying to understand how to use pocketsphinx. Seems like a useful skill to have.
However, to keep moving forward with the Open Movie Project (OMP), I'll see how I can use rhubarb to do lip-synching. There is already a blender plugin, so I need to see how that'll work and what kind of results I can get out of it. I would like to have tighter integration with MB-Lab though, to streamline my workflow.
Here are the tasks I foresee