I'm taking that thick neck thing as a joke!
As it was intended, though I do like the big neck look.
And about the lenses, that is pretty much the crux of the argument, does it hamper the actors ability to show emotion, or rather does it negatively affect the action, I don't think anyone can answer that for sure as yet
I think it's obvious that the lenses would hamper the ability to show emotion. Let's look at some examples.
1.) RoboCop. Okay, so he doesn't have much emotion anyway. But look at the end battle, where he took the helmet off for his big showdown with Clarence Boddicker. Why do that? Cinematically, it's more powerful when you can see Peter Weller's face, the expressiveness in his freakishly large eyes. It gives him the ability to communicate pain better, and it makes his up-close and personal fight scenes with Kurtwood Smith play much more dramatically than the earlier one, when he threw him through several plate-glass windows (which is still an awesome scene).
How about 1989's BATMAN, where Michael Keaton effectively used his eyes to make you believe he would peel your ribcage open and eat your heart.
LeVar Burton in Star Trek: The Next Generation. Geordi LaForge was blind, and wore something like a girl's hair clip wrapped around his eyes. Did it hinder his expressiveness? Maybe a little, but he had the rest of his face exposed so you could see him furrow his brow in frustration, and it pretty well made up for the fact that his eyes were covered. Like a man wearing sunglasses.
How about Willem Defoe in Spider-Man? He wore that full-face mask, but in order to keep the expressiveness in place, they made the lenses retractable and the mouth hole filled with a thin fabric screen that allowed you to see his teeth flashing inside. Because the eyes and mouth were necessary if nothing else was to be seen.
So, my conclusion is that with Batman, the cowl being rigid (unlike in the comics) necessitates something else being visible. His mouth is a given; the only other option is eyes. It worked brilliantly for Keaton. Bale was pretty effective with it too, I thought, if not quite as scary as Keaton.
With his eyes covered he's left in Ben Affleck territory - Daredevil, of course - and that just... looked cool but didn't really work too well. Of course with DD you have to cover his eyes; he's blind. LOL. So that's a lose-lose situation. With Batman you have the option to leave the eyes visible.