This humanizing feature is something I love using in Logic when editing drums. Also playing out piano parts to get that realistic feeling. For instance, is I can humanize he volume, I could achieve the sound as tho I'm a real piano player. All notes aren't 127 velocity all the time. I should be able to radomize the velocity.
Also for drums, I like using Studio One transient detector when editing acoustic drums that was recorded in the studio. Sometimes I can't record the drums over which cause for drum replacement. It would be nice to replace the kick drum by dragging the analyzed transients from the audio track to a midi track and recreate the feeling. I love the fact that I can drag the transients already, but in order to recreate that feeling, I have to manually click every other midi note to adjust the volume. 127 velocity works for pop and hip hop, not acoustic live drums.