These two sentences seem self contradictory. The "third iteration of Managed Inclusion" is just another "freebie pilot program" as I understand it.
Actually, there's no clear definition of any of the versions of MI.
FSDs and individual screeners decide which flavors, if any, of MI will be applied at a particular checkpoint or airport at any particular time.
If you know the rules and they are practiced consistently, then the bad guys will get in. That's why even some FFs show up at Pre unprepared - you never know what to expect.