I'm in the midst of putting together a book about designing your own cotton knits for the kitchen and I can tell you for sure - there is no one definitive way to write a pattern.
Any designer will tend to gravitate towards their favorite or most comfortable method of putting a knitted piece, and its pattern, together.
In fact, I've even "invented" a couple of new ways to write patterns, ways that I find much easier to use than most of the printed patterns I've seen. That will all be in the book, but still, it's a matter of choice.
So if you see a way to customize a pattern to a style YOU like and can work more easily with, believe me when I tell you that you're not breaking any cosmic knitting laws by re-writing it to suit your own convenience!
Go for it and happy knitting!