Yes I’ve added that item to the list for the next update. For the max image size, anything really that prevents a visitor from uploading massive amounts of data to your site is the reason why that setting is included. For full-screen images at web-resolution (72dpi), there is no need to allow anything over 5MB or so. But even 10MB as a limit makes sense. It really depends on the average size of the file(s) that you are allowing users to upload. In general 2-10 MB seems like a good amount.