I think the problem here is a narrow definition of what constitutes 'iconic post-apocalyptic' looks.
Now, if your only frame of reference (or the only one you accept) is Mad Max, I can understand why you're hung up on leather armor and shotguns.
I love the Mad Max flicks and like the idea of parts of the Wasteland world looking much like it. Some parts looking like Mad Max (towns that resemble the pre-war world, some semblance of pre-war life BUT...post-war problems), some looking like The Road Warrior and Mad Max Beyond Thunder Dome (barren wastes with little resemblance or even memory of the pre-war world, isolated compounds and Barter Town like hubs).
BUT...it's Wasteland 2. Not Mad Max: The CRPG!
You have to consider other post-apocalyptic writings and themes and world that are every bit as worthy of some incorporation.
Ever read Strontium Dog?
The protagonist, Johnny Alpha, was born during a strontium storm caused by...wait for it...a nuclear detonation during his world's World War 3.
He lives in a post-apocalyptic world, but it's different than Mad Max. It's got sci-fi elements, but that doesn't make it any less post-apocalyptic. (Granted, I doubt anybody wants to see space travel incorporated into Wasteland. I sure as hell don't, but that's only one aspect of Strontium Dog and nobody says EVERY aspect of the different inspirations NEEDS to be incorporated into Wasteland 2. The sure weren't in Wasteland.)
How about Terminator? They live in a post-apocalyptic world, but they aren't running around in leather.
Of course, I'd also like to see guys who look like Kyle Reese in 1984 in Wasteland 2 as well.
Point is, there's a lot of good post-apocalyptic media out there to borrow from to give Wasteland 2 it's own unique flavor and do what the original did when it would give a nod to popular and well known elements of the genre.
It's a big world, with room enough for Road Warriors, Strontium Dogs and
Kyle Reeses and plenty of other nods to a great genre.
Hell, the Rangers (in some of the artwork that's been floating around here) look like post-apocalyptic Rough Riders.
Fixation on ONE concept or image from the genre narrows everything down to a dull world with very little in the way of surprises and intrigue.
Gotta say, one of the things I loved about the original was wondering where the laser weapons and high-tech armors came from in the first place...