To be able to use newtone as a channel rather then a FX. Open like slicex into the sequencer, then load up the audio file, which puts the notes into the piano roll. It's a bit awkward to use as an FX, have to play the audio through it, then render out to get the new audio into the right place in your track. (send to playlist +midi don't work when using different steps config - see next)
When using different steps per beat configuration, it doesn't detect the time correctly and needs to be shifted every time audio is rendered out or midi data. A pain to have to do each time. As stated above, send to playlist doesn't work because of the tempo differences. It needs to be saved as a unique sample to have the tempo changed to the song tempo to fit in the correct amount of bars as it shows in newtone.
Make it easier to drag all notes in a pattern
When moving a note, have the ability to move it and all notes past it or using a different click/click button combo, squish the next note (like it does currently)
+ option to process polyphonic audio.
+ extract midi from audio.