Well, I like brass on my slippies and traditional folding knives. It's probably not the ideal liner material, but I'm willing to sacrifice some performance for aesthetical enjoyment.
I can appreciate purely functional knives, like some Spyderco models or the plastic handled Scandies, where it's all about getting the job done without worries about the look. However, on my slippies I preffer carbon steel, brass and natural handle materials, I like a knife that will "age" as I use it.
With that said, I think knife companies don't usually listen to us knife knuts because we are a very small part of their market. This changes from company to company, of course. Some of the "specialty" companies that cater to more demanding knife users and collectors might pay more attention to us, but big companies that sell mainly to average Joes probably won't.
I've seen countless threads on other forums about how people would pay more money for a Victorinox knife with S30V blades and micarta or G-10 handles. Maybe you and me would be interested in such a product, but 90% of Victorinox's customers will just consider it a pricier SAK and keep buying the regular ones.
Maybe something similar happens with Case.