Looking to add some APs and get back to CoC while waiting for Secrets of Arkham, I downloaded all the spoilers for the APs and went over them. One thing that struck me was that Cthulhu faction gets so few cards. After doing the math (assuming math + spoilers are correct), if one buys 1x each AP, the factions get the following number of cards:
Agency and Miskatonic: 60
Syndicate and Hastur: 63
Yog-Sothoth: 67
Shub-Niggurath: 68
Cthulhu: 50
10 fewer than the next lowest faction, almost 20 cards down on the highest factions. Sure, the numbers don't tell the whole tale, but still seems odd. Cthulhu has just one AP with more than 4 cards, all others have several.