IIRC, has been mentioned several times, but tools to expand / collapse hierarchy display really, really would be useful.

Importing an FBX model this evening, it showed up as 24 independent trees. As default 100% scaling delivered model as a fly-speck, I had to iterate to eventual ~100k% scaling. Each time, I had to collapse the hierarchy, tree by tree, then select the copse and delete it. All this took 100++ very precise clicks given the minute hierarchy 'v' & '>' arrows. And I'll have to collapse the hierarchy yet again now I've found an acceptable scale, this time to parent the parts to a place-holder...

And, after all that, it cannot be posed without falling apart...