I'd like to be able to add things that I use often to it.

For example, with nothing selected, it has the options for the Document Layout.
I would like to add to that to include

Export PDF - and select my proof settings

So in essence - I could add the options to export to
Print Ready PDF
Proof PDF
Image file format

etc. - just to be able to add those things would make this panel even better.

There are other things I'd like to add to this property panel - but that's the general idea, and everyone would have their own things they use often that they would add.