It's also as much portion size and controlling intake of fries and soda as it is about the food items themselves. Adding a large coke to any meal is probably worse than the food itself. 80g of sugar with no nutrition or fiber.
I'll give you that its a low source of nuts and unbreaded fish. But if we are talking about working at McDonalds and not having meal prep time, that could be supplemented by bags of almonds, pistachios, peanuts, cashews, sunflower seeds, pumpkin seeds, and cans of tuna, salmon, and sardines at home.
That leaves dark veggies. Their bacon ranch salad says its "romaine, baby spinach, baby kale, red leaf lettuce, ribbon-cut carrots and grape tomatoes." Youd probably want to supplement some cooked greens at home.
Being able to buy the above food at 50% off would, imho, be a great foundation to a healthy diet, if you can control portion and avoid temptation.