Tim,
The perspective above the hole diagram shows what Simpson was thinking, presumably, and it looks to me like the approach slope is from left to right and might very well kick any shot from the left down away from the green. As to the green, it is clearly visible, so I gather his intent would be to have the back right higher for that reason, as I think most gca's would do. I know a few who would make the left higher to totally screw the left approach shot as basically impossible to hold the green!
Of course, that begs the same question of strategy - if you can't really hit the green from the left due to bunker and fall away green, is the left side of the fw really an option, or is it a mirage? Or, do you make it more difficult via the bunker but not impossible by adding reverse green slope?
As to the right side bunker, you say it may be to hinder the bail out. My basic question, in "pure' strategic design where you are trying to encourage certain shots, not necessarily punish them - Why punish a bail out shot? The golfer has already given up hope of a birdie, barring miracle chip in and in strategic design, is there any need to punish the bail out further? Depending on his scramble ability, he has a 30-70% chance of bogey just by being off the green, averaging 50% and thus the notorious "half stroke penalty."
The bunker reduces the chances of par a bit, but is it really, really necessary to do that in strategic design? Yes, its theory, and yes, I would argue hole length and variety matter, too. But, I would also argue that those second bunkers get put in far too often around the greens and in reality, are unnecessary for strategy in that sense.