So with all this talk of lenses, I just remember a movie that did it well - decent shape and not too big.
Now, if you were to give Batman lenses that would be there all the time, then they probably shouldn't shouldn't light up (not all the time anyway), they should probably be semi transparent and I really think combined with a cowl that can move you'd negate any issues regarding the actor being able to convey what they need to.
Also, I think a Batsuit could look awesome with that kind of muscle type texture (the more subdued stuff on the red part of the abdomen).
Spawn may not have been a good movie, but it had some pretty nice spooky/gothic imagery with the main character that Batman has lacked in this current franchise.