I read the other reviews, and doubled the spices except for the cayenne. I also added some black mustard seed to the cauliflower that was roasted. I didn't have cilantro, so instead I simmered a few curry leaves in a little ghee and topped the roasted cauliflower with them instead. It was excellent.
I used the veggie Better Than Bouillon for the vegetable broth, so I didn't find it to be bland at all.
Need to triple the spices!!! The soup comes out very bland with just the amount given in the recipe. I ended up dumping in a ton of extra spices and curry powder just to bring the flavour up.