Other items not covered in the documents that I’m aware of:
Add Attach track to an actor. There are 4 modes that are easy to overlook in the Attach popup menu that make a big difference. I don’t think these are covered. None of them do a true attach without changing the relationship unfortuantely.
Click on Transform +Section provides 4 options. Naming and what they do is confusing and not documented. Being able to layer transforms can be useful if you wish to have an actor vary a bit from a path it’s following. (like adding floating to an flying vehicle)
Spawnable versus posessable is also confusing to users. Explaining the differences and suggestions on where/when and what type of actors to use for one versus the other woudl be good in the documents.
Another frequent confusion for new users when scrubbing beyond start or end and seeing objects suddently jump or disappear when spawnable.
Another common issue is the confusion of which camera is being used. If you have multiple cameras or have set up a sequence of camera cuts if the shot proterties are not boudn to the right camera what you’re previewing in sequencer may be wrong or may be wrong when being rendered.
You have addressed some of the confisioon between master sequence/level sequence concepts in the new documents.