I live in Orange County, CA, and we are required to use the low VOC paints. I do not see any difference in the long term usability, or the fade resistance in the sun UV rays. I also have not seen the exempt versions to be much different in cost. All quality automotive paints are expensive today. I painted single stage PPG (exempt VOC) and also had some parts powder coated the very same color. These two finishes sit outside in the sun every day. The exempt single stage color has held up much better than the color powder coated parts. These two different finishes are now three years old.
I understand the frustration of being required to use a special paint but I think you need to look at the larger picture. It's much easier to run down to your local paint store to get a extra product in the middle of a small paint job. You cannot do that with paint brought in from out of state.
I have begun to use "mail order" paint from TCP Global in San Diego to save some money. They sell all kinds of paint, and you get it in three days.