I have a couple of bigger projects in Fusion, so I link subdesigns into one masterdesign where they are joined together.
Because those subdesigns act as one thing I always need to add a rigid group at the end of the feature line. The best way to work for me now is to delete the existing rigid group and create a new one if I've added components (changing it is too much of a hassle).
I think it would be a lot better if you could toggle on each componentlevel if it's a rigid group. So if nothing moves I could select the top node, make it a rigid one and never should worry about it again...
Regards,
David