I always load mine up with the sprouts, as much Thai Basil as I feel like ripping up, all the lime juice I can squeeze out and then let the rind hang out in the pho, plus a generous squirt of Sriratcha and Hoison to the point where the broth is light red and 1 spoon of the chilli oil. No fish sauce though, I loathe that stuff.
I made Pho at home last week. It was not the greatest veggie broth I've ever made but I had all the right ingredients and still enjoyed the hell out of it.