Carbquik is awesome, it’s been around forever but you can NEVER use any of their recipes unless your end goal is a clumpy mess. I use it to make Belgium waffles and you ALMOST can’t tell them from the real thing! On the net carbs thing, has to be in there on it’s own, can’t fake it by adding fiber. Even then for many people net does’t seem to do the trick.
On the pizza thing, I do the traditional fathead recipe with the addition of beef gelatin and yeast. The combo gives it a little bit more of a chew like real dough and the yeast although it won’t rise it, will give it more of a bread smell and taste.