Why would Colt (and Ruger, and S&W) put out something new that isn't sorted out? Because they can get away with it. I've been a frequent visitor on the S&W Forum and folks there will tell you not to worry about light primer strikes, tool marks in the rifling & muzzle, and my favorite, crooked barrels. Just sent it "to the mother ship" and the folks in Springfield will make it right.
If you complain about S&W's QC they will go back to the legendary Triple-lock and tell you it wasn't reliable, according to the British, so Smith (guess they didn't have their "mother ship" back then) introduced the 2nd Model Hand Ejector. You can find comparable drivel on the Ruger forum. Ruger will fix it and faster than Smith & Wesson.
Today's consumer (including us gun buyers) have been and are being trained to not expect much out of manufactured products. In the case of guns, most buyers won't shoot them all that much and in many cases aren't savvy enough to realize things like out of alignment barrels are a problem. Their buddy Joe shows them how to crank the rear sight over and they're good to go. To the gun makers this amounts to a satisfied customer. As for the complainers, they will send the guns back and if their lucky get it fixed or if not, declared "in spec" and returned. And finally there's those like me who get disgusted with the crap, sell what doesn't work and buy used stuff that does.
Someone else can get on this soap box now. My old, broken ass is about to bust through it anyway. (LOL)
Dave