Zaptruder (banned GAF member, creator of Freedom Locomotion) gave me feedback on an idea I had last week, so I came up with something new today. I'll just quote the message I sent him:
The main problem with sliding locomotion I'm trying to solve is that one hand is focusing on movement, when it could be shooting, throwing, swinging, etc. Enter PacMan locomotion: instead of holding your thumb on the trackpad, just tap. As long as you're running in place, you're running in the direction you inititated with the tap. That hand is now free to interact in other ways. And if you want to change direction, just point and tap, and go back to interacting.
Would love to hear people's thoughts/questions.