It would depend on how wide and what the subject is and your desired goal. Have you tried putting the lens on and using it exclusively for a short period instead of using it when you think you need it? I have a 55mm wide angle for my 645 and use it rarely. When I need it I know it, meaning it's the only coverage that will yield the image I need. Sometimes a "normal" lens just won't do. It's a tool in your kit that takes practice in its application.

Good Luck,
Curt