LTD,
Sure, I can appreciate that having emergency service attendance for what you might class as a minor tech fault is annoying. However, as I've said we've been caught out before, and related to this case, it was a PAN, was I concerned about the reason why the flaps were stuck, and we weren't getting anything else from the flight crew regarding this. In our procedures we have to call a Full Emergency for some things, hydraulic failure being one of them.
Edit to add: We didn't know why the flaps were stuck, that's one of the main reason why I was thinking about putting on an FE......And why declare a PAN?