In what way would that significantly improve on the current Explode command (applied to a selection)?
Once you explode one or more groups (or components) each containing other groups or components, they are all highlighted. One or a few more R-click/Explode commands will get you down the hierarchy pretty quickly, unless you have very deep nesting.
OOPS - the Feature Request refers to Layout, not SU.
Perhaps just make Layout work the same way as SU with an Explode or Ungroup command that highlights what’s just been exploded? I rarely use Layout so am not familiar with how it works now.