Let me clarify and refine my observation abit. You are correct that the new 2nd tee is only in play if a bomber were to strike a long, overhooked tee shot from 10 tee. I also agree that the smartest strategy would be a carefully placed layup setting up a short ptich. However, Palmer in 1960 shows that what you and I deem smart, may not be what Dustin Johnson thinks advisable.
More to the point, the new tee looks out of place. I noticed it as soon as I had finished crossing the street. Its location just looks forced. This is true of several of the other newer back tees, especially the one that is part of the practice green and is used to lengthen 14.
I will expand the topic a little and speculate as follows. I don't know what the USGA is going to use for yardages on the shorter holes, but several will be theoretically driveable, 1, 7, and 8 come to mind, as does 10. I wonder if the USGA may find conditions and winds that actually invite shortening of certain holes to invite more interesting play from the tee. Of those 4 holes I might hit driver on 7 and 8, and would hit it on 10, but I am not in the same area code in terms of length and accuracy off the tee as Open Qualifiers so they may have other thoughts.