Razor,
it was very interesting to read your opinions on the first Kris Dhillon book. I made Kris' base for the first time a couple of months ago, and was really really positively surprised with the dish I made (the CTM, just for the record). It was really good. With this particular recipe, I think it is hard to improve.
I tried the Jalfrezi, too, and the amount of veggies is enormous and well, it doesn't really work. The chicken curry recipe was good in my opinion.
The marinade: I was thinking exactly the same thing as you when I was making the marinade, that it had way too little ingredients, just salt, yoghurt, chili and oil. But the end result was really great. Wow. You should give it a try.
It would be really interesting to try a bare-bones approach to making curries; ie. make curries (and base sauces) with just the bare essentials of ingredients, and then build from there to see what each ingredient adds. All recipes on this site are very complicated and when you make it you think okay, this is good but probably have a lot of ingredients in there that don't really do a lot for the curry.