Matthew, I would wonder about messing around with a green that close to the cliff's edge. It's already pretty precarious on the back right. I can recall seeing the pin in the mid section, just a couple of times. The hole is a better hole with the back pins, because the rear bunkers have relevance. A front pin takes them right out of play, because the player is not tempted to get it to the back. So, the rear bunkers are in play, because they are in the mind's eye of the golfer, or, at the very least, should be in his pre-shot strategy session, as in, DON"T GO LONG.
Poa annua greens are rarely able to get too speedy. Maybe in June when they try to replicate Open like conditions. When I caddied there, the greens were never fast save for the month of June, and even then it wasn't over 10 ft. All the greens at Pebble are too good to ruin (soften) Placating the ego driven speed race is just about the dumbest thing they could do (So they probably will).
As an example; Lefties victory this past week was due to his putting. He stroked those putts the way a player needs to, on Poa annua. I call it taking charge over the ball. It's a necessity in the winter time on Peninsula.