After 1.6.3 I noticed that aftertouch sounded super stepped. I thought, "maybe it was like that before and I just didn't notice it somehow?" Then I came on the forums, and sure enough, 1.6.6 fixed it. Now it only steps at the extreme end of it's range, so it uses whatever resolution real estate it has to make sure you can do vibrato and tremolo and other aftertouch stuff smoothly. Vintage knob sounds pretty similar and pretty awesome. I was hoping it would be more randomized- it sound like it's still 6 set values that are just slightly spread rather than unison. But it still sounds amazing. Anyway...short answer is that if the aftertouch behavior doesn't bother you, and you're not using MPE, you won't notice anything. Otherwise, you will be glad for the update.