There needs to be the ability to adjust video resolution from 1080p. I would at least expect it to respect the resolution of the original file so that the only difference between the original and the new one is the music.
For media composers like me the main use of this tool would be export WIPs for review. I work a lot in animation and a lot of WIPs that I send are to animatics or early stage animation that is normally low quality and in no way warrants a 1080p picture or file size. Even with the documentary and drama work I don’t do it as these things are often initially checked on tablets and phones … massive file sizes are not useful. Currently a 4 min video gives you a file size of more than 1gb. Not practical at all. This is not to be used as a final rendering solution so why make it so rigid?