Ableton Forum

1. Constrain breakpoint drag in time (x) axis. Can do in vertical axis with Ctrl.
2. dB value popup when mouseover on line, not just on breakpoints
3. Copy value from\to neighbouring points (useful if creating a long flat section - can be a bit fiddly at the mo)

And of course the usual request for Bezier or other curves, not just linear segments.

all good suggestions.
I would like to add:

ability to right click on a breakpoint and be able to directly type in a value. This should also work when selecting multiple breakpoints so they all get the same value.
You can even expand this to allow for typing changes in value like typing "+1" will increase the existing value by 1.

+1 for numerical entry and your other suggestions.