AFAIK Onyx has a group rewriting PDF reader. Some new features and navigating options (like the important feature - "PDF column reading") were added.
This new reader is still on its testing phase, this is why the 1.7 FR is a little bit delayed and implementation of some other planned features postponed.
I think we could continue the discussion after the new PDF-reader has been finished(which is a matter of days). Possibly they have already found an even better way to navigate through scanned PDFs.