While I realize that this is a Technology Preview, and not the final product, a basic feature is missing from the save process and that is a confirmation that the save has been completed; a standard feature in software products today.
Currently, when saving an image there is no confirmation dialogue that the save has taken place; also the name of the file is not displayed in the Title Bar as is per normal, which would in normal practice replace the words "New Image".
Regards to you
Cyber-Angel