I thought about a field or something, where I can drop pics in the sorting admin mod to delet them on the fly instead of using my brain and rembering the name of the pic an manually deleting them.

would be nice and easy

I would second that suggestion. It sure would be nice to have a trash can on the sorting page.

You can select each image on each page you want to delete or use ftp directly.

However, the best for suggestions is to open a ticket, otherwise it might get lost.