When I was on the BMW forum, honestly, a minority of people were speaking up. Everyone was having these issues; some people were okay living with them. I would post links to the forum, but the site appears to be down at the moment. Many riders ride around issues with a bike. Either they love the way the bike looks, or they love the way they look riding it, or maybe they love the sound. Like HD, the BMW is as much a culture as it is a bike.
The Busa has issues we all live with, and many don't even consider the issues a problem relative to their love of the bike's strengths. How much have we spent making the Busa lighter? Or the positively dangerous stock brakes. But fundamentally, the Busa is "right." It's simple, super fast, and the handling is stable and forgiving (especially with Ohlins).
I was attracted to the K1600 for its mechanical complexity. I wanted more sophistication than the Busa had. The K1600 is fascinatingly complicated. The brakes and the headlights are as good as it gets on 2 or 4 wheels. But I quickly realized that complexity didn't add up to much regarding riding experience. The magnificent six feels very ordinary when you swing a leg over it. The headlight that follows your turn for game-changing night vision costs $2K to replace. And then everything kept breaking. And there were the handling issues, too. The bottom line is I found the K intriguing, but I couldn't trust it.
If you can find one, the 1250 GS (or Adv) bike is for you. It's built for the road and is fun to ride, and you immediately realize why this bike is the most popular in the world. It feels like it has been developed over years of adventure. It's not an intercontinental tourer, but it's an excellent exploring bike and can go off-road. It's a BMW, so it's a bit complicated, but at least it feels like it's on your side.
Ok enough about this subject!