Not sure if it’s a glitch like the Jorge-kit’s textureless shoulder-piece (because the Watchdog gun-skins look exactly as advertised), but compared to the promo-pic, Watchdog in-game looks like an extremely weathered grey/silver, whereas the promo-pic for Watchdog is much more of a whiteish silver with stronger contrast against the black parts.
My suggestion would be adding a second armor-coating to the 152 reward-pile (maybe call it Top Dog to thematically tie in with Watchdog) that has the extremely clean, factory-new bright white/chrome red/pitch black look from the gun-skins so it looks like a more properly matched set. That way anybody who wants something a bit more subdued and gritty/dull can keep using Watchdog, but people like me who thought we were getting something more vibrant and high-contrast are happy as well.