First, thanks for putting this together, I love consolidated errata!
One concern though, page 5 of the FAQ document details that a "push" is a movement effect. Later on that page:
Q: Do I get a Disengaging Strike when a model leaves my Melee Range due to a Placement Effect?
A: No, you only get Disengaging Strikes in response to Movement Effects.
This would seem to indicate that pushes generate disengaging strikes.
Again, thanks for all your efforts!