For the Mithril fans on PC, there is a mod for one over on the Nexus:
I miss having separate chest and leggings as it helped with customizing my guy. I'd like to see more capes and cloaks. Also more animal head helmets. The bear head is cool, but I'd like to see wolf, sabercat, troll, maybe even a skeever just for laughs. Having a light and heavy variation for faction armor would be good too. My heavy armored Stormcloak felt soooooo awkward. I'd also like to see emblems that could be applied to armor and shields. If you're Thane of Whiterun for example, you'd have the option of attaching their horse symbol to your chest or painting it on any shield and likewise with other factions/holds/whathaveya.