Well, to the quality of the content question. I do agree that video quality dropped significantly.
If some interesting thing takes more than 5 minutes to setup, forget it, it is not happening. More and more things get tabled for later, which never happens. This is understandable, since you need to make scheduled videos, but it is also very apparent and is not looking good.
More and more videos (including this one) are of a type that is easy to make (comparatively, of course) - talking head or screen capture.
Edit: Just for comparison, quality of Mike's or Micah's videos is superb, but those videos are rare, but they are way more enjoyable.
I guess it is just a different style and the need to make some money out of it. Unlike Mike's videos, I mostly "watch" Dave's videos in the background without paying much attention, anyway, there is just not enough "good stuff" there to warrant full attention.