Sorry, I missed to see page 2 and 3 of this thread before posting.
It seems all my questions are answered. I tested and it worked for me. Very interesting how long this topic is around.
It worked fine for my, by using your advises for change the skeleton in the child BP and then used the referenced Animations Sequences (and references blend spaces etc) by variables.
Seems to work fine for now. have to play test more tomorrow.
Thank you!
Just for the next who is stumble across this thread…–> Use the following two explanations and you will face no problems also in actual release (with a bug which is not affected on using it like this):