I find it somewhat useless to be able to revert your audio tracks back to instruments tracks, for readjustments, if you'll lose all the plug-in inserts(I haven't tested "sends") that you had on the audio channel before reverting back to the instrument channel. It would be super beneficial to be able to save the inserts when the channel was an audio so that when you revert back to the instrument track, make the adjustment and transform to audio again, all those inserts could either be reinserted or saved with the same parameters as before.