I don't see the instructions as being excessive concerning number of layers.
My models require the primer coat, the color coat, one clear, the decals, and then another clear,,,,,,,unless I am doing an SEA camo, then they get 4 color coats after the primer, in some places.
It is not so much how many coats we put on,,,,,we should be more concerned with how thick each coat is that we use.
We should be using the minimum amount of paint required for each coat,,,two thin coats of even the main color is better than one thick coat (with a thick coat, we really don't know if it could have been thinner or not)
An old real car painter once told me that "you can always put another coat on,,,,,,but, it is danged hard to take too much paint back off" Of course, he had been painting cars so long that he could "tell" how much paint he was spraying as he went. I still need to put a thin coat on, look at it, and decide if it needs another thin coat, haha.
Starting with White Primer is a great idea, though.
Rex