Yeah, the Mail icon has looked stale for awhile. I've never understood why they didn't at least update the stamp to coincide with the OS release imagery. Theres a certain amount of brand identity that goes along with icons, so I get whey they'd opt for tweaks over wholesale changes. But at this point, a tiny pic of Yosemite would make more sense than the random eagle that's been flying around there for years. Personally, I tend to swap my icons for custom versions anyway, so it doesn't matter much to me. But it would be nice if Apple would update the look every now and again, too.