I've also owned a lot of bikes and driven hundreds of thousands of miles over the past 25+ years, and my experience has been that you buy what makes you feel good, not what is fault free. HD is not fault free, but where I live, it is the main brand that people buy. I believe that is because it makes them feel good, look cool, or whatever; but I know that they didn't buy it because their primary concern was to buy a bike they never had to take to the shop.
I bought the GTL because I wanted the creature comforts for my wife and me, a smooth and quiet ride and long range while getting 50+ MPG. The Wing is a nice bike (I've owned three of them), but they get nowhere near 50 MPG.
I work to pay my bills and put food on the table, but my mind is always thinking about the next adventure on a motorcycle. Both me and my wife live to be out in the open air, flying smoothly down the road. If I have to deal with a little issue every now and then, so be it. I can also tell you about a terrible hurricane-like rain storm that I had to drive through on the GTL not too long ago. Even with my many years of experience, I was scared, but the GTL was sure-footed and got me through it without any close calls. Going through something like will make you realize just how little all of the small issues are that we deal with (like a USB issue) really means. My GTL took care of me when I really needed her; so I'll take care of her when she needs me to
I should also mention that out of your list, I have only experienced one thing (a switch failure). Some of the things you mention, I have never heard of, and one is resolved by changing tires (not a problem of the K1600).
Honestly, for someone that has never owned a K1600, and with all of the concerns that you have, I recommend that you purchase a different bike, because if you did buy one, and you ran into any issue with it, I can see you talking badly about the bike to others; trying to make people who own one feel bad about their purchase, and giving the wrong impression to those looking to buy one. None of what I say is meant to blast you either, but rather to help you from making a purchase you will regret later. Also, I'm not a fortune-teller, but I'm certain that a 2013 or 2014 model isn't going to make a difference for you, as you will always find people experiencing issues with every year of every bike. If you love to ride though, you really should do yourself a favor and get on a bike and enjoy doing something that can bring so much joy. Never put off tomorrow for what you can do today, for tomorrow can be taken away from you.