Thank you for the suggestions here.
One thing we feel very strongly about is keeping the bank tagging flow lightweight and fast. If we go down the route of adding each and every feature available on the standard invoice entry form to the bank tagging tool, this really defeats it’s purpose.
It’s very unlikely we will provide a file upload control on bank tagging for the aforementioned reasons (instead take a look at tagging from the Receipt Hub). Project tags is a maybe, although I would ask you to add your vote to the existing feature thread.
The description field is another “maybe”, currently it’s locked to the short description field on the invoice. I don’t believe this has come up before but again we will monitor any interest in this feature from other users.