One thing that I do wish that Pentax/Ricoh would take to heart is root cause failure analysis. I am not saying that they don't, it is just that when you get a failure such as the aperture block, it tends to stick around in newer models for a relative long time. Look at the auto focus failure that started years ago with the 16-50, and in some ways it is still casting a shadow of the plague.
I can see the problem cropping up in the K30, and taking time to collect sufficient information and units to start to be able to characterize the problem, while in parallel re-skinning the K50. Ok, but by now - hopefully, they should understand the problem and not have it perpetuated in to future models. Hearing that it is maybe showing up in the K-s1 and K-s2 along with perhaps the K70 too, is not a good situation to be in.