What should the BOT have done.
1) Back in April 2011, when Spanier briefly brought up the scandal to the BOT, he should have been pressed. Everyone knows that Spanier ran the show back then.... the BOT was weak and should have demanded answers right then. They could have had half a year to prepare for the onslaught.
2) The BOT should not have called Paterno to fire him. He should not have been fired at all. He and Spanier should have immediately been put on administrative leave with pay (as in, the Monday after the GJ presentment leak).
3) Obviously, the Freeh Report was a disaster. Picking the Freeh Group proved to be a terrible decision so having the internal investigation with another group would have been helpful. Also, the BOT should not allow the new group to present the results to the public before the BOT had a chance to review them. They also should not allow the group to hold a press conference to present the results, but rather merely make the report available for the public to read.
Those moves would have helped a lot, IMO.
Completely agree.
And now that we know the NCAA was (& perhaps others were) heavily involved the investigation, I would add to your #3 that billing it as a "completely independent investigation" was a major mistake.