My opinion on the EDARs stayed roughly the same along the years, although I do find myself a little more hostile to them as of late. I still believe they should have been cyborgs, akin to the Husks, rather than pure artificial constructs. I also believe they bring very little to the table in terms of pure power : the stalkers and crawlers are already hard-to-hit foes that can deplete your mags by throwing off your aim. The Husk is already there to make you remember to watch your distances too. Fleshpounds and Scrakes are already tough opponents capable of blocking your shots, and the Rioters are also armored, forcing you to aim elsewhere.
The only thing that truly set them apart is pretty much how ANNOYING they are to deal with. If you've been reading my posts for a little while, you know I often praised the fact they're pretty much a free EMP grenade, and I'm not against enemies keeping you on your toes simply by making you rethink your main strategy (aka : aiming for the head). But that doesn't save them from being boring enemies that are more trouble than they're worth: trappers especially can badly screw you over, often simply by hiding behind other zeds or snagging you from behind. Clots share that trait of blocking your movement, but they are very easy to dispatch and can only do so at melee range. It feels a tad more lenient and balanced. While the other two variants are... worse husks? With the comparison being even more interesting considering they also have a different weak spot leading to an interesting reward: their gas tank. But unlike EDARs : their movement aren't nearly as difficult to predict, and they can still die to a perfect headshot (or two). Which I believe is more interesting than entirely removing the ability to headshot in a pinch.