As far as I can tell California is right in the middle of 50 states in terms of property crime (a little below actually at 26th-27th) [1] so I’m not sure where this doom and gloom is coming from. Well, I did find a few laughable articles from mass media claiming that prop 47 had some impact, it itmdoesnt hold up when looking at demographics across the country and over a long time.
http://www.ppic.org/publication/crime-trends-in-california/
In 2016 it looks like property crime actually decreased.