Fair points. It's tough to maintain the same artistry of a show like this once it reaches the masses. Few have been able to do it. I remember watching the first two seasons and thinking "that's it?" I was expecting things to resolve and reach a conclusion but they just kind of stopped leaving you thinking. That was the genius of the show. There was very little in the way of typical plots that have clear climaxes and resolutions. After a while, I accepted it was a character exploration show and I loved it. It was almost more of a day in the life rather than linear story lines like most dramas.
I still really like it, it's just taken on a different character to me. As someone who works in brand marketing and has worked extensively with very well known ad agencies, some of the portrayals annoy me a little as they aren't close to reality, even back then. For example, the whole meeting with the Dow executives this last week was just asinine. It seemed to me a forced scene they needed in order to bring the old Don back and show that this season's virtuous and boring Don was only temporary. They needed a device that would do that, so they forced that scene.