Some teams have such iconic uniforms going back decades that they should never change them other than minor tweaking. The Cowboys are one of them. Same thing with the Packers, the Bears, the Vikings, the Chiefs, and the 49ers. At one point, the Vikings STUPIDLY went with those Denver Broncos-style stripes on the side of their pants, though I believe they got rid of them. It's great to watch old footage of your team and see the uniforms looking essentially the same.
The Cowboys should just make a few minor tweaks.
1. Get rid of the green tint in the home pants. That's no longer needed. It's a holdover from when it made them look better on older TV sets that we no longer use today.
2. Go back to using grey numbers on the dark blue away jerseys that they used in the late 80s and early 90s. Those were better than the white ones.
3. This one is a maybe -- I could go either way -- but we could put a little patch on the side of the pants with the player's number like they did for a while in the 80s. That was okay and I could live with it, but wouldn't die without it either.