Dan,
Having attended to GCA.com for a year now I got a good chuckle out of 6.
1. Regardless of which tees you play you get a chance to see the pin on 6 coming off three on the way to 4. In fact, of the 4 blind/semi-blind greens on the front, only on the volcano green do you have a chance to preview the green and pin earlier, in passing. To me, that shows a high-level of architecture at play, as sight lines in the routing are setup based on the playing characteristics of unrelated holes (to be played later). This was also done without a feeling that the holes are on top of each other. They maintain their identity, well.
2. The tee boxes on 6 vary not just the distance, but also the degree of blindness of the green. Separating the tees from the green is a slot which I think is cut into a minor ridge that would separate the tee and green. The back tees are lower and to the right, the middle and forward tees are higher and to the left. From the back tees, I'm told the green is totally blind. From the middle, the ridge obscures the left part of the green but the right front was visible (just). I would be stunned if Paul found that cut there. I think the cut is deliberate, as is the amount of blindness resulting: partial for lesser players, full for better.
3. The mound is severe, true, and it was mostly bare sand, but, you shoud know it is there and if you aren't used to putting one, they have one built into the practice green, too.
4. The mound isn't really any different than tiers defined by a ridge. What's different is the green is divided radially, not linearly. Based on the day, 1/3 of the green is probably safe, another 1/3 has to navigate the flanks of the mound, and the remaining 1/3 has to deal with the hump.
5. At least on the right and front, not having noticed the left, there's ample room off the green for easy recoveries. So, from a strategic angle, the thinking strategy is to play to miss off the green, pinside, as opposed to on the green, but with the mound intervening.
All-in-all, a well done short hole, and another interesting challenge on the course.