Linksland defines a links course, Ally. The other factors — many now considered essential to a links coures — are modern presumptions; shot values, types of grass, etc.
I guess I do not disagree with your list. I just believe, like many of the items on our lists, some of the criteria has been developed over time, but should not prevent any linksland from serving as home to a links course. The addition of cultivated turfgrasses or irrigation may be more intensive than the involvement of man at early links courses, but they are not much different.
Specifically to your list: In reality, early links courses had very little turf at all and no regard for type of trategy (at least none planned). These two items are "modern" criteria.
A links course is simply one on linksland; and it is presented using the natural land as opposed to a burden on artificial earthmoving.