I'm going to have to agree with Behemoth on the upscaled textures, they really don't offer much improvements over the default textures and the filter you put on them to make them look less grainy and pixelated worsens the quality without adding any real detail. You really are better off using the default textures to cut down on load time.
Also I've decided to expand the casing sound addon into a sound overhaul addon for the weapons, using the various sources I have available to improve the feedback of some of the weapons (like the Styrac mount).