Bill, I wish it was really that localized, but unfortunately I mean that in a general sense. My opinion (qualifying it as such) is based on the numerous pistols, caliber x-change kits, optics, and uppers I've purchased in the last several years. I've noticed a downward trend with increasing QC slips, say in the 3-4 years.
Over that time, having worked with their customer service, their attitude seems to show a paradigm shift coinciding with the higher occurrence of production issues. I am left thinking that retail customers are not as much a concern and Sig's focus has been on product development and chasing .gov contracts. They want more market, and high throughput at all costs seems to be the mantra.
The biggest thing is they seem to want to justify anything you find if they can manage to get a gun to go bang before sticking it in a box. That is not to say they all have issues, they just don't pull obvious problems and send them out hoping customers don't care under the current US regime and standards.
Outside cosmetic blunders and sights that are pretty far off (pet peeves that say qc to me) on the more serious side a P229 went back with a framed machined off so the locking block was not square to the bore axis, and 320 with a FCU not stamped and cut to allow the trigger bar to clear at the rear of its travel, a SP2022 with a barrel feed ramp not finish machined to remove the hard edge at the throat transitioned that I called the Jam-matic. The list goes on, but I'll spare you
Of course I have had a number that were fine. But I have rejected more at dealers to avoid headaches after dealing with their CS on some of the above. Some of the things I have been told over the phone would be considered pretty shameful. Twice I thought to myself, did you really say that out loud. Specifically around their "gunsmiths" and standards in their repair shop. To the point I would never send a gun back to Sig unless I absolutely had to.
If they stood behind their product like S&W, Ruger, or Springfield (I am sure others) do, I could forgive them their letting production QC goes. But they just want to argue and not take care of clear issues. I think their older stuff before they tried to gain large market share did not seem as prone to issues. Even hardcore Sig fans on their dedicate forum seem to be noting some of this nowadays.
I've currently own classics, a 1911, 320's as well as romeo optics and a range finder. I love the 229 and 320. I want to like them as a US company, but things have to change. IMO.