You have a great table and set-up. The super platter has a non-inverted bearing which is superior to later VPI designs IMO. It's hard to know exactly the nature of the AMG bearing from the printed descriptions in the reviews, all of them merely repeating AMG's publicity. However since the bearing is actually one of the 3 feet, I assume it is also a non-inverted bearing. A platter, by the way, is supposed to be dead. Otherwise you'll have resonances.
If you haven’t done it in a while you might want to check the bearing for wear both the ball and the plate. It can easily be brought to better than new.
It’s not clear what you would expect to improve with the AMG TT.