I believe the green glass will be making a return. Criticising the glass armor for being neon-green is like criticising Ebony armor for being Black, or Steel armor for being Metallic Grey. It's the confirmed natural color of the material. You can criticize the design all you want, but honestly, I thought Oblivion's glass armor looked pretty nice, except for the helmet.
But it's difficult to get helmets to look right (My favorite Oblivion helmet was the Steel Barbute)
And for those wanting realistic armors... do we really want a return of Oblivion's Chainmail Coif?
I actually enjoyed all of Oblivion's armors except Daedric, Ebony (I prefer larger, fewer plates, but loved the color scheme), Female chainmail (Erg... too much skin), and Elven.
Of course... once you got past Leather in the Light Armors, none of them suited a Thief anymore
. That was the real failing. But, they looked good for Skirmisher/scout types. A shame Medium Armor went away :/