First of all, the noted characteristics are not mine, but a compilation of what I've seen discussed on this site and which I believe have considerable consensus among the active participants. I do happen to agree with most of them.
Regarding the number of bunkers, I think it was MacKenzie who wrote that there should be some economy in their use, with their placement and function much more critical than their number. Unless a course is blessed to be on sand (like Pacific Dunes and Prairie Dunes), sand bunkers are expensive to build and maintain.
I suppose that on a short course, the number of bunkers may be more critical if it is to be challenging. Personally, I like bunkers of different sizes, shapes, depths, orientation (lateral, diagonal, cross) and placement. I even like directional bunkers which can from time-to-time come into play. Sites devoid of natural features probably require heavier bunkering.
As to the correlation between the length of the hole and the green size, I think that some architects have held that the longer the hole in terms of the approach to the green, the larger the green. At sea level, a 235 yard par 3 would tend to have a rather large, often uncomplicated green. A 550 yard par 5 with a wedge or less on the approach may do very well with a small, sloped green.
Heavy internal contouring, "greens within greens", and 6,000 -10,000 s.f. greens seem to be coming back into vogue. It appears to me that folks on this site prefer less formulaic, more provocative greens and green complexes. It is probably impossible to get a lot of movement in various directions in small areas. Also, on heavily played courses, small greens are difficult to maintain.
Personally, I tend to like smaller greens, and generally believe that the length of the approach should having some bearing on the size and complexity of the green.