I do not find the fix on unit selection much of a 'fix.' I rarely fight with all regular units (using rogues instead) so am unsure of how they're displayed but to find my hovers 'hiding' behind 4 or 6 'healthy' rogues is already annoying. I can hardly wait for opening day of battlegrounds when I am in a big fat hurry trying to find a damaged unit!
(But I suppose as an answer to overall customer needs, I suppose this is the better answer then some - at least I'll tell myself that in 2 days when the real trial begins.....)
Edit: After 2 rounds of battlegrounds I ammend my previous assessment. Using mostly rogues, I'd say that yes, it's an improvement but I didn't really see it until
after I destroyed all of my drummer boys & color guards. Not really sure how this feature pans out with those who use multiple units. It's still a bit disconcerting to see my primary units over to the right of the healthy units.