I'm not worried about Gohan not coming back, he's just not been around recently. Makes me suspish. Also I know Videl has never had that much significance, but then neither has Chi Chi and she still has a personality to this day.

EDIT: Ugh, Matt and I have just reached the Saiyaman Saga in our rewatch of DBZ and it is painful how much sass Videl had and how she has lost it all. xD