After much CAD frustration today I finally grasped that selecting components in the viewport with a mouse drag does not actually select components, rather it selects bodies - due to the default selection filter settings. Becuase the geometry highlights with the selection, the (novice) user is led to beleive they have selected the components they want and can perform the approrpiate operations, but in fact they can not.
I would suggest something active in the UI to indicate what has been selected, or at least which filters are acting. This would at least give the user a clue that something was acting on their selection. As it is, I've been using F360 on an off for months and never realized this filter existed or made such a dramtic difference in what I could/couldn't do in my assemblies. I realize this is probably non-trivial to implement cleanly, but I think something should be attempted.