Should I continue with the same Crown Moulding?

We have an open dinig room and formal living room that currently have a standard crown moulding with about 5 inches of painted white wall and another small piece of moulding underneath that. I am wanting to add crown to the family room which is connected by open doorwayt from the dining room and a slightley larger opening going to a small landing then in to the sunken living room. Because the living room is sunken and the walls are taller I wanted to incorporate a larger crown moulding and was thiniing about not doing the extra trim piece and paint between. Will this look ok or should i jsut continue the crown and trim as it was done in the other rooms.