Chris,
Under your example, the architectual merits of the hole would change due to a change in its surroundings.
One can't ignore a seaside location and the added element the ocean brings with it, WIND.
Wind is a vital element that can't be manufactured. I would say that strong, and/or prevailing winds are elements included in the basic design principles of a good or great hole.
The wind pushes the golfers ball out of bounds, limits distance, affects ball flight and creates doubt.
It is one of Golfs greatest assets.
The Ocean is a constant, non-silent hazard,
from the tee to the green at Pebble Beach.
Challenging the golfer to bite off as much as they dare. Challenging them to come as close as they can in order to get the prefered angle of attack for their next shot, and always reminding the golfer of the danger.
Chris, # 18 would be a good to very good hole with your surroundings, it is a great hole where it sits today. Its location was no accident. As they say in the Real Estate world, Location, Location, Location.
Despite the desire to isolate a golf hole and view and analyze it in a vacuum, we can't ignore its surroundings, they exist, and have to be factored in.
Bandon Dunes and Pacific Dunes, weren't forced into those locations, they didn't get there by accident. There was a desire to be near the sea for valid reasons.
When you blend golf with land and sea, you create something special.
But, that's just my opinion.