That is my plan too, to decrease my nic content, only because I'm concerned about future price or even availability. I don't believe there is anything at all wrong with nic, based on all the evidence provided here. As far as a law suit, I don't think it would fly. Ask the Australians. And some USA states are trying to do it right now, including making liquid nicotine illegal to be sold, or shipped into the state, just like cigs. The argument would be something along the lines of the idea that NRT's are all FDA approved and regulated, and that process costs a fortune and is a huge barrier to entry for anyone other than BP. Concentrated nic would fall outside that, and can you imagine what an ounce bottle of juice would cost at patch prices? Plus "special taxes" and whatever else they throw into the mix?
ETA: in the eventuality we are discussing, you likely will never run out of nic, it will just go bad (shelf life). If the stuff could be shelved for 20 years I would own 10 liters right now. I have 2 liters, and that is probably "too much" although I'm uncertain about the real world shelf life in a freezer, in a fully filled glass bottle.