Hello akq and Ballard Foodie,
I'm not trying to rudely "school" you when I say this but Than Bros is a pho house not a general restaurant. Just like in Vietnam, that's all they do for food. Many shops are one-item places. A spring roll is basically the same thing without the soup but unlike pho it takes longer to serve and gets in the way of quick pho service. Please notice that Than Bros. has the best prices in town hands down and yes, serving other things will affect their prices. You get to enjoy the good pricing because they are specialists. There are other places that serve better pho but Than Bros. prices are hard to beat.
In my experience, pho houses have the better pho. They're places where you slam down your bowl then head out, not places to tarry and chat. If you want more choices you gotta go somewhere else and please, don't try to tell someone from another culture how to serve their own food.
Back on topic, reports on Monkey Bridge from my friends has been mixed but I'm hoping they have some good items as I live in Ballard and it's within walking distance.