I would imagine there are a lot of other things, that have been brought up over the last several years, that are higher on my list. One thing that would be nice along these lines is to have our "normal", or the last airport we were on automatically used as the initial airport on the Flight Plan page.
I've already got basic flight plans to my most commonly used destination airports, or trips, so I just have to load the FP from the list and correct or modify from there.