I'm a little late to the party on this topic, but would like to add my 2 cents... I previously flew F-15Es and we could easily have a weight change of 35,000lbs (80,000lb max gross weight aircraft) between takeoff and landing (combination of fuel burned and ordinance dropped). In the pattern, we flew only AOA, nothing else. This made sense because the critical AOA of the wing never changed, but the stall speed (level, unaccelerated flight) changed dramatically.
Now I'm flying the T-6 Texan II and teaching young Air Force pilots to fly. We (only) have 1,000 pounds of gas compared to a ~6,000lb airplane. The speed (level, unaccelerated flight) for critical AOA doesn't change as much. However, we teach using a combination of AOA and airspeed in the pattern. We have a minimum airspeed during the turn to final and a minimum airspeed once established on final. At the same time, there is a minimum AOA that you can't go below - i.e. you must fly the faster of the AOA or airspeed.
In this way, the AOA only becomes a factor in two circumstances - First, you're heavweight (i.e. near max gross weight). Second, your bank, turn rate, pitch, airspeed combination in your turn to final add up to nearing the critical angle of attack. This is where the AOA really helps - I have seen students at a normally safe airspeed, but a very unsafe AOA by demanding too much out of the aircraft (too tight a turn DW to Final). Remember, you can easily stall your Mooney at a "safe" airspeed by pulling around the turn too hard (bank + G). AOA will warn you there.
Hopefully soon, I'll be a Mooney owner and get a little more "cred" here, but thanks for letting me post my thoughts...