While i like the new system of displaying your currently selected units, there is a small flaw in it.
you can not view the stats (damage and armor) of neutrals, once you have multiple units selected. the unit icons will remain in the stats box, when selecting the neutral unit.
to view the neutral units stats, you have to select a hero (not your own one) (or a building (?)) first, which seems to reset the stats window.

i am not sure, whether this goes along with keeping the focus of your control group (controlwise) or whether its simply a gui issue.