I have the same issue and I can attest that it is very frustrating!
As rmorehead indicated, the defaults are not very useful for scanning letter-sized text documents from the document feeder. This dialog comes up when scanning from third-party software.
The dialog does not have an "Advanced Settings" tab, link or button.
The highlighted defaults below are what we'd like to be able set somewhere, to avoid having to change them for every single scan.
