You are not alone, Justin. Many students are under the same impression. In fact, I personally have been characterized by an Authorized Instructor on another site as one who teaches only the two Basic Patterns. This, of course, is his own limited view and not actual fact.
I thought I remember you saying that 12-1 and 12-2 were optimal patterns. Or are you just saying that those are the ideal starting points, and from there comes customization?
I guess another way of looking at it would be: if I achieve a pattern that is identical to 12-1, are there any modifications that would make that pattern more accurate/powerful/consistent?