Hi Daniel,
that is exactly the workflow I use right now. Except, I don’t think you need to lock tracks in the sequence to achieve this, just make sure that all tracks are unselected and the marker will be added as sequence marker and not as clip marker.
Here is the workflow I use:
stop playback
‘M’ – add marker
‘M’ – open the marker window
Write marker name
‘TAB’ – move to the comment section and enter comment
‘TAB+SHIFT’ – Return to marker name so that you can close the marker window with ‘ENTER’, which you can’t do while in the comment window, as far as I know.
The problem is that for this workflow, you need to stop the playback. When continuing to watch the footage, I often return to the already created comment to add additional text. To do so, I have to use the mouse and click on the marker comment in the markers panel. Then you can continue writing during playback. Unfortunately, I still haven’t found a way to assign a keyboard shortcut for that action.