Re ordering partials - if I have a spectrum file and partial X is unused and or doesnt match up with another partial I need to morph it to I'd like to be able to delete and then re-order the stack of partials in one of the spectrum files.
If you delete a track (or tracks) in the editor, then do a Save as..., you have the option of renumbering the remaining tracks (squishing it down to a smaller number of tracks).
Drawing pitch envelopes accurately - eg a flat line or a smooth curve would be awesome.
Though this is probably not exactly what you're asking for, I often use smoothFrequency or replaceFrequencyWithAverage from the track filtering menu (accessed from the button at the bottom of the editor).