
Childe Roland |

I'm not so sure that any one person can be thrown under the bus for Serpent's Skull (SoSS in particular). The Paizo folks are too classy to play that kind of game, and no one here has the inside scoop on anything that Mr. Kulp did or didn't do other than armchair private detective agency speculation.
Each AP has its issues and people that think it is the end-of-the-world bad. From what I've read of Serpent's Skull on my own and seen around the boards its problems are no more terrible than the "hey you're all in another pocket dimension" issues that Legacy of Fire had. Or the typical "We killed gedrin lamm and then the campaign fell apart" you read over on Curse of the Crimson Throne. The most common reason people have difficulty with an AP is that they haven't let the whole thing get published before they dive in and find out around mondule three or four that they have been hyping up a completely different animal to the PC's.
In terms of a reply to the OP. I blame Kingmaker (get out the torches and lynch me :) ). Kingmaker is massive in terms of hours of play. I think a lot of folks (my group included) were waist deep in that AP when Serpent's Skull came out (we've been rolling on KM for almost a year and only about half way thorugh). Eventually we'll come around to giving Serpent's Skull a go, but for now it's on the back burner.