Nice breakdown, Daniel.
I think your grading is pretty much spot-on.
The Celtics are ranked 26th in Offensive Efficiency so if anything, maybe a 3/10 grade is being too lenient.
I have often scratched my head at some of the plays we run and some of the player combinations used to run them this year.
I'm going to give Stevens some slack and hope that the whole bloody mess was just one giant series of experiments - even the ones that seemingly never had a chance of working - and not a true sign of how he intends to run an offense in the NBA.