Curry is best when prepared spicy. I do not want to eat curry that is not as spicy as I want it to be. I know that there are people who have their own way of preparing their curry, and I cannot really care. In my opinion, as long as I can eat the curry that I want, then that is fine. This recipe of yours is good, but it lacks a little bit of spiciness for my own taste.
Where there's a will there's a way