Sorry, but this idea that Belichick did no planning is just ridiculous. Your claims that he was "just making it up as he goes" is more like what your post is showing than actual reality.
- Belichick clearly focused on having an O-line that could run the ball and made sure we had the RBs to do so. Hence his drafting 2 last year and 2 this year AND franchising Thuney. His having Michel, Harris, Burkhead, and Taylor is clear forethought on his part.
- Belichick brought in young TEs who would GROW with this team in Keene and Asiasi. Far too many are already giving up on them despite them being rookies and the entire Covid mess. Izzo is actually playing decently.
- Belichick started rebuilding receivers last year. Harry, Meyers and Olszewski are works in progress. Again, YOUNG players that far too many are giving up on already because they look at the "greener' grass of other teams while ignoring that this team's offense is significantly more complex than other teams offenses because of what it requires receivers to do both pre and post snap.
The Patriots clearly liked what they had seen in Stidham. They figured he needed some more seasoning which is why they brought in Cam. The Pats clearly THOUGHT they could Maximize Cam's strengths and minimize his weaknesses while Stidham got better. And they seemed to do that the 1st three weeks. Cam has since imploded. Today, he showed me that ONE player screwing up time and again could actually lose a game for a team. Cam was SOLELY responsible for every series ending prematurely in the 1st half. I don't remember Marc Wilson or Scott Secules ever being that bad.