The Seahawks were well within their right to try to disrupt the Cardinals' kicking game---they spotted flaws and attacked them. That said, their execution of the first FG block was illegal and they should have been penalized. How the NFL could deem such a play as "unreviewable" makes a mockery out of the replay system.
However, the Seahawks legally turned the game around on the blocked punt---again, they detected a flaw and a weakness and tried to exploit it, this time without the need for any flags or reviews.
Richard Sherman has a point about predictable snap counts---and it's not just on FGs---it's on the Cardinals' offense which for weeks has been hiking the ball on the first hut 95% of the time. The Cardinals do wait for some key times to try to get the defense to jump off-sides, but, at the percentage in which they are being predictable with the snaps, they are giving the opposing defense a clear advantage---which is one of the main reasons why they were not able to sustain drives versus the Seahawks---timing disruptions, penalties, missed blocks, dropped passes---al it takes one or two of these a drive and the drive is over.
Thus far---this year's Cardinals do not a very well coached team on tape. They have been dreadfully mistake prone. Opponents have been detecting and exploiting the Cardinals' flaws while the Cardinals are not finding way to give themselves advantages. It's as if no coach on the Cardinals' staff can clearly see or anticipate how other teams would prepare for them. In close games it all comes down to preparation and discipline. It is time for the Cardinals to flip those switches, if they are serious about contending.