Additionally, if you use the soup broth to "boil" the noodles, your soup will retain the starch released from the pasta during cooking, making it cloudy and floury tasting.

I agree with aargersi. With long cooking noodles will disolve into paste. And how long does it take to boil a noodle anyway? Maybe 8 minutes.

I would cook them separately and add them right before serving so they don't go mushy ... also cook them al dente even more than you normally would, because they will heat up more / soak up soup when you add them in