It would be great to have more functionality in Waveform editing. I would like to be able to add an effect, like EQ or Reverb to a section, but be able to fade that effect in or easily adjust the point at which it happens. Sound Forge (windows) has a great way of doing this.
For example, in Sound Forge if you want to add EQ or any effect for say 5 seconds of a file, you highlight the area you want to effect, and in the window where you adjust the EQ/effect/paste etc there is an option for advanced settings, where you can adjust the start and end points of the effect, as well as the wet/dry mix and fade in and out times. It also works for mix/paste.
I know you can achieve this in multitrack editing, but it requires more time and steps.
Please, and thank you!