It's now been a little over six months since my "Pathfinding the shark" post, which now appears to be the most read post of all time on this site.
I hate to be a naysayer. I have no intention of telling people how to conduct their business and even less intention of telling people how to play their games. My opinion doesn't really matter.
Even so, it seems that my feelings about the new Paizo splats were fairly correct. Since that post the Ultimate Combat book has come out in full and it wasn't met with much approval. There seems to be a (relative) consensus that it's the worst book Paizo has ever put out.
NB: That's not saying much. Even at its worst, Paizo's products are still miles better than the worst products we ever got for 3.x.
But (and again, I hate to speculate) it could indicate a trend. The core book was a decent rewrite of the core, the APG was great, Ultimate Magic and Bestiary 2 were okay, Ultimate Combat is ok-to-meh-to-suck. This is not a scientific fact but a "common sense" observation that might have no value at all: the more supplementary material you put out for a game, the lower its quality.
In our current Pathfinder game everything 3.x and Pathfinder, including third party material is "fair game". For me, that's a nightmare to consider and I'm only building my characters with the PF Core+APG. For some it's paradise.
I'm a Pathfinder supporter but I was never a loyal Paizo fan/customer. All I can say is that with each book they release the further I am from their core audience. Nobody's loss really, just sharing my feelings.