Feedback from just 5 minutes of messing around. - You can't delete the audio track from a video, only mute it - You can't add a new Audio track - Because of

Feedback from just 5 minutes of messing around. - You can't delete the audio track from a video, only mute it - You can't add a new Audio track - Because of the two points above you can't really seem to be able to overlay a song to a video that already has an audio track? - You can only scroll horizontally and not vertically in the track block, so tracks can go out of screen and remain invisible