I think the key part of your post is the (possibly inadvertent) acceptance that there isn't really such a thing as a traditional DoF. What the job entails at different clubs appears to differ hugely, and so the type of person needed differs depending on what you actually want them to do. Thelwell appeared to do a pretty solid job of restructuring the football side of things here, and overseeing a sensible transfer policy under tight financial constraints. That was what we needed at the time and he should be applauded for doing it well. Doing well in the role as it was, and doing well in the role as it would be now, or as it would be at another club with a different set up, are not the same thing, and it's quite possible that he wouldn't be the right man to take the steps we're looking to take now. It's no different to some managers being suited to a certain type of job or even players working in specific systems.