Archie,
Maybe I should start by saying that I do not believe thick rough should ever be thought of by the architect as a defense mechanism so your comment that if the bunker were not there you could be worse off if the rough is up is off base in my opinion...next, I think with firm turf throughout that bunker should act as; either a side board for guys my length to land next to to get the ball to run over to the right to the best approach angle, or a target for shorter guys that cannot carry the right bunkers. Those shorter players should then have the benefit Tom Paul mentions of a fairway kicker for the last 20 or 30 yards along the left hillside.
My issue with the trees is that if the fairway rolled down and over that hill that they sit on, guys my length that flare a ball out to the right are going to run down the hill further away from the green and be left with an exciting, albeit difficult recovery instead of a sap-grabbing chip out from under a pine tree.
I'll agree with the poor cosmetics of that elbow bunker (after all, we have dozens of ugly ones like it at HVCC), but not with its placement...
To me, architecture and maintenance cannot be separated when thinking about a golf course...