I love large walk in showers. I would flip the laundry over into bedroom 3 and combine it with pantry space. The current laundry area would be absorbed into the master bath for a large shower/soak tub. The current master tub would be storage.
Great side dish for the holidays! Roasted cubes of butternut squashed tossed with balsamic sautéed onions, kale, pecans, dried cranberries. Comes together in the time it takes to roast the squas (Sauteed Squash Recipes)