The law is the law and PCC can’t workout side it. I am a Liberal Democrat and as you are probably aware we are in favour of regulating it’s use for those who need it on health and wellbeing grounds and as you suggest to help disempower OCGs.
As far as police officer discretion goes, I can’t speak for them but as we all can smell it everywhere these days. I would suggest its only those causing a nuisance that get dealt with?
Mark