I'm on CC, however I did find what you mentioned, with the ability to swap channels but if I record only one channel (left or right) and copy it and assign it to the opposite channel, whether true sterio or not, at at least gives the feeling of stereo because it is now coming from both channels (both speakers as well). For a youtube video, that is sufficient stereo to me.
In Vegas, I could simply right click on the audio track, select open in external editor, and edit it that way. Not sure why there is not a similar feature here.
Eric