Hey there,
Thanks for reaching out, you will be happy to know that yes we will be allowing mute, unmute, start, and stop fades to be independently set to a custom amount (1-60s) or follow the loop/measure length automatically.
We will not however be making this a song setting.
This is currently being worked on but will not be available until after 4.3.x which will hopefully have a new beta out relatively soon.