It would be really useful to have the ability to store information of an uploaded work to reuse on others in the attachement manager. Something as simple as the last data entry from your used automatically being entered. Especially when posting several pieces at once to a sketchbook thread, this would be useful. Alternatively a form of bulk upload of sketches could be useful as this is mostly an issue connected to sketchbook uploads (though it may apply elsewhere as well.)
I think this has been brought up before, but some searching around didn't yield any results, so thought it would be worth enquiring about.