In my case, I enter the nodes manually and adjust each one precisely. I have been known to zoom in to get the edits surgically precise. This is handy when I'm using several tracks to create a solo or a fill. one or two notes or a lick from one track and the second track finishes the fill.
Tracks 12 & 13 with their envelopes here are a prime example of this....
These are the piano fills in THE BEST CHRISTMAS in the first verse. Comped from 2 tracks and surgically edited to sound like one cool fill.
It could be argued that it's a bunch of work doing it this way, but as I see it, it's the only way to do it. Take the time needed to get the results you desire. And as you get used to working in this manner, it really becomes quicker. The biggest problem is when you're working with multiple tracks on a solo. To pick the right parts, you have to listen to many different combinations until you get the "right one"....