Powell,
At PV #7, the green is unreachable if you lay up short of HHA. TEP's 200 yard number was from the very nearest-to-the-green edge of HHA. That number is a bit high, but no more than 10 or 15 yards. It is just anout 275 from the very short edge of HHA to the front edge of the green. The fronting bunker is what makes it "unreachable".
Tom will have better info on the rationale behind lengthening #7, but I think it's safe to say they did it to keep up with the distances players are hitting the ball these days. They lengthened a handful of holes and the end product is pretty awesome. The course (read: due to equipment) evolved to where a top player may not his driver at all, or at most two or three times in a round. Today that is no longer the case. 7, 9, 13, 15, 16 and 18 are virtually mandatory drivers from the tips for just about all length players right now. 2, 6 and 12 give you the chance to hit driver but do not demand it.