Status symbol next to the filename in the binder

This would improve the project management a lot. You can have an easy overview about the status of all the files.

IMHO

This is what the outliner view is for. Note that stutus and label are available in the search results table just so that you can change them really quickly after a search. For all other cases where you want to change the status or a label, you should use the outliner view or the corkboard. The binder is just an overview of what files are in the project, it is not intended as a place for actually changing the data of those files.
Thanks,
Keith