I have to say that AL3 is much better than 2.x series. The UI is snappier, easier to navigate, the audio engine seems to be more responsive in Standalone version and - that is my best - piano stock presets are way better than in the old version.
Unfortunately due to sustain pedal bug, I cannot fully test pianos, but I love the presets. In 2.x it was too ambient, distant and artifical. It is a huge difference.
In AL2, when I loaded piano preset, I started playing with knobs to get some sound of it.
In AL3, I load a preset and play a piece just for fun. So much better, thanks.