States make their own laws as far as "shall" or "may" issue.California is a "may issue " State and except for the more Liberal areas of the State most permits are issued.With the exception of the more obvious reasons the majority of States allow open carry.There are also local "home rules" that supercede the State law in some cities.
We should continue to be concerned with the 2nd Amendment as it pertains to freely owning our firearms without fear of confiscation.I don't see the words "concealed carry" in my copy of The Constitution and wont argue with those that feel it's implied.
With regards to the OP's original post it is still up to the individual States to decide how concealed carry permits are handled and with the majority of States labeled as "shall issue" I don't see a real or even imagined threat to the rest of the Country.