I don’t want to admit that trashing the prefs worked, but it did.
GAWD, I feel like such a noob.
But really, WTF does trashing the prefs fix these things? To clarify, my issue wasn’t slow playback. The playback was fine- once Motion spent 10 seconds contemplating every single parameter change.
2 cents: My degree is in Computer Science. In another life I was a software developer. These kinds of major usability issues are something my team would get yelled at for…
Oh well.
Thanks Steve!