None of this stuff is particularly complicated basketball. Honestly--it's pretty basic stuff. It needs to be for college kids to be successful running it. Most any decent high school coach could write up these plays. The Xs and Os is not what made this a great basketball offense.
Picking the sets that work for our personnel, and coaching up the kids to be fluid with our sets and know all the scoring options is what made us great. There are SO many teams that run a decent set, but the players aren't even looking to score. Our guys all have the green light to make a play after every touch, and seem to know what the reads and scoring options are. That is GREAT basketball.
I don't disagree with the vast majority of what you wrote, though that bolded part I fully disagree with. The off ball movement with the majority of college ball is pathetic.
Agree it's not particularly difficult stuff to draw up/have available. As demonstrated by the website you can find these plays anywhere and with time you should know them like the back of your hand.
And yet 90% of college teams mostly just run pick and roll with two guys in the corners for the vast majority of their plays. How many of the teams UConn played this year had a playbook even close to as complex? Maybe X and Marquette. Even Creighton's was much simpler.
A lot is having the personnel to run the plays but also the guts to run it when most kids learn pick and roll, drive and kick, or one-on-one growing up and your point guard is new to the team. Very few high school and practically zero AAU teams run anything close. Even some NBA teams run less complex stuff (though part of that is shot clock related).
It's not just having the green light but also having the timing down with the guys running around screens, the guys setting screens and the passers throwing the passes. This takes considerable work as a team to get even one of these plays down to the absolute correct timing with all the options on the play. The focus each play has, from each player, is immense; especially when defended tightly/aggressively.