Sounds like the biggest issue is mental. Players do not know the playbook. Talking about it too long in the huddle and don't know where to line up. They were not ready for OTA and mini camp and did not prepare. That to me is a bad sign, McD needs to get stricter.
Fair enough, but you need to let the players make mistakes in practice so that you can "correct" them.
Isn't that really what practice is all about?
Aren't OTA's a kind of pre-training camp training camp where a lot more mistakes are likely to be apparent?
I look at OTA's as a precursor to training camp. I look at training camp as a precursor to practice games and I look at practice games as precursors to the season when games really count.
I expect OTA's to be rife with errors that need to be corrected so that everyone, and especially players that are new to our team, can get some experience with our teams system of play prior to training camp. This is especially critical when a team is implementing a new system with a new HC.
I expect training camp to have less error prone practices and be a place to determine who plays and at what position. It is where newly drafted players get their first real practical introduction to "NFL level football" and they, along other newly acquired players, begin to find their roles on the team. This is also when the team begins cutting down the number of players competing for jobs.
I expect practice games to be where final adjustments are made determining who plays and at what position. This is when playing for a job gets the toughest because we are dealing with releasing some of the better players who are fighting for a job.
This is also where our coaching, and game planning, and play calling gets tested and final pre-season corrections are made in those coaching related areas.
Once the season begins there will still be a few changes to be made to players and positions based on performance (or lack there-of), injuries and other reasons players may not be available. I expect gameday plans to be altered at half time, based on the results on the field.
So, in the end there is a continuum of change starting with a lot of change and corrections being made at the OTA's, and occurring at a decreasing rate until the end of the season.
The idea that singular static changes in personnel are needed to improve the team's performance, no matter how good that coach or player may be, is usually overstated by the fan base because "constant effective change" is the real-life blood of a successful NFL team. Not just moving " players" like chess pieces.
How did you think those highly rated players were developed in the first place?