Don't write them off as stupid, or say they don't 'get it' and disregard their input. I don't know I like subtle colored lighting. I almost never use a white light. All my lights have some hint of color in them. I find it adds a lot of realism to the levels, plus it can really help to bring out the life in the textures.
Every texture has a light color that complements it well.
If you can find that color, you'll give your level a little extra visual punch. But there are also millions of gamers who have no idea what is Unreal Warfare editor, what will be in it. Well, I can't talk about too many specifics, but already it has some very cool stuff like the terrain editing tools, where you can paint directly on the terrain and mold it in real time. The overall goal is for me to make a nice, easy to use interface for whatever features the other programmers add in to the engine. If a feature is hard to use or access, the level designers won't properly exploit it properly.