I'm in AZ. As the constitutional carry measure was debated I studied what happened to Alaska's crime stats before and after their 2003 conversion to "Vermont carry" (the other common name for it).
It was interesting. Most crime stats stayed flat before and after. No upward spikes afterwards, which is to be expected - most murders are after all various types of "crook on crook" crimes...drug deals gone bad, mostly. Those aren't affected by carry laws.
There was however a drop in one category of crime: rapes. It turns out Alaska has an insanely high rape rate and has for a long time...never knew that before. No idea why - may have something to do with the long winters, may be cultural. Whatever - point is, there was a detectable drop.
It was either coincidence, or possibly more women were strapped because before, they didn't want to come "out of the gun closet" and spend the time or money for the permit and/or training. Possibly reasons of cost, of time spent, or of not wanting to be that much "out and on paper" as a gunnie ("un-feminine" maybe?).
In any case, examining the Alaska data left me with no fears at all as to fallout from the AZ conversion.
Like Alaska, AZ has kept the permit system in place as a voluntary thing. Weirdly, it's still useful in-state - a permitholder like me can go into a bar or eatery that serves drinks as long as it's concealed, I don't drink and I have the permit. It's also useful for reciprocity - I can drive from my house straight through to Virginia, Florida or Penn. as long as I veer south of Illinois.
The various AZ proposals for "college campus carry" include linking that to permitholding.