For multi track mix down an option to auto tick only the highlighted tracks from the project. With a busy project it is easier and faster to select which tracks to export from the arrangement page instead of the finding them in the multiple mix down menu list and tick them.
Also an option to include sends when exporting multi files. Live has this and it is great. It has an option to export files with sends/master included. So even though some tracks share the same send each one is exported separately with their respective send amount. Great for archiving or stage stems.
Finally an option to export stereo files with multiple formats at one go. Like 24bit wav+ Mp3 etc