Ozone is an interesting topic. CFCs seem to be very potent climate gases. But I haven't checked any calculations about them, yet. I'd love to see a good analysis of the absorption-spectrum. Adding something new to the atmosphere has a lot of warming potential - but the question always is how fast it reaches a level of saturation. For ozone and CFCs years of media coverage haven't brought any insight. Having 3 different updated versions of Dupont-products in the atmosphere could be good or bad - most likely people haven't bothered to check, yet... But they're all full of furious knowledge. People "know" that banning CFCs "cured" the ozone hole - but they don't ask why it shrunk too early, and why the situation hasn't changed at all for decades now...

I think most likely the banning was good - but the reasons don't really make sense.