Something like this perhaps?
Are those bezier curves? At least that’s what has been asked for, plenty of automation request threads before. Neverending +1 for pimping the automation editor.
Logarithmic smoothing?
I.e., a vector-like tool for the creation of clean, precise curves in the automation editor instead of (or in addition to) the current point-by-point interface. I can see many ways of implementing this but I think the way creating fades works in Pro Tools (see screenshot above) would be the most intuitive.
+infinity