I've seen a lot of people on here say that 5 Guys makes the best burger around. I love their fresh, unfrozen meat. But I don't get the itch to go there very often. That could be changed with 5 simple fixes.
1) offer milkshakes. When I think of good burger joints I also think of good shakes. SmashBurger has this part down.
2) offer a variety of cheeses. Why not give me a choice to mix up the cheese on my burger?
3) need to add a few other toppings options such as avocado or egg. Again, Smashburger has this down.
4) provide the option of a butter bun.
5) improve the fries situation. Fries are meh. Offer shoestring fries.