Well, I definitely would not want to increase the cap in an open league... The higher the cap, the fewer players who are good at that cap.
Keeping the cap at $80m means that you'd have to have a pitching staff of 1300 IP or so, which means you need to bring your team's WHIP over 1.00. Similarly, it means that you would need another 800-1000 PA, which means you have a few more guys with OBP below .400.
I think it makes sense to kill AAA.