Archie -
The timing of your post couldn't be more perfect. The raindrops on my plans for the 14th hole at PCC have barely dried and the pencil lines are quite fresh. Myself and an abbreviated committee walked the 14th hole yesterday and I returned later in the afternoon to further my studies of the hole. The architectural evolution of the hole is as follows. In his original design for the hole, the elbow bunker you refer too was present as well as the bunker short left of the green and the right green side bunker. The internal slope of the green placed a premium on approach from the right side. The short left bunker and adjoining fairway beyond and left of the green created an additional strategic component when hole locations were/are placed to the left. Unfortunately with todays greens speeds it is difficult to cup along the left side. In 1937 in preparation for the 1939 Open, William Flynn made many recommendations to the Club and USGA based upon how he observed the better golfers in the region play the course. He did this to many of his designs. Mr. Flynn also saw that the ever changing equipment was negatively impacting the play of PCC and other courses. His recommendation for the 1st hole (now 14th) was to add a bunker to the left side 250 yards from the middle of the rear tee. Those are his words but there is no further explanation. Knowing why he did it is a bit of a guess, but we can imagine that he felt the advances in equipment was effectively shortening the hole and golfers were able to swing freely beyond the right fairway bunker and easily play the ball into the green. During the run-up to the '39 Open, Flynn recommended a number of new tees, additional bunkers (basically eliminating bail out areas on holes 8, 14, 16, 17 and 18) and playing the original 5th as a par 4 and not a par 5. The change in par was because of equipment. He notes that many local pros were reaching the par 5's in two and this was not his intent. The '39 was played as a par 69 and over 6800 yards.
As we look to the future of the 14th hole. Our intent is to restore the short grass left and short of the green closer to the bunker. Yes, I agree, the current right fairway bunker is not very challenging to recover from and it looks odd. The reasons for this are the firmness of the bunker sand - ease of recovery. And secondly, there was an immediate need a number of years ago to perform a quick fix on the bunker to eliminate washing out of the sand. Flynn, the 'Nature Faker' placed the bunker right in a draw. The immediate solution was to raise the left side face to block the water. This will be remedied in the future and the bunker will better blend with its surrounds. The sand type will also change which will alter the ease of recovery from the bunker.
As for the two bunkers on the slope leading up to the 6th green. Flynn added those to provide definition of the carry side of the steam that crosses the hole. Originally the area was not as defined as it is today with the variety in grassing types and conditions. The simplicity of the look of these two bunkers and others at PCC are most likely due to the construction of the features. Many of the changes recommended and implemented for the '39 Open were completed in-house and without the aid of one of Flynn's construction foreman.
Hope this help shed some light on the 14th and Flynn's changes.