I appreciate that it must be a hassle for tourists but if you control your spend properly before you fly out then you shouldn't really have to bother about changing pesos back into dollars at the airport.
There are no restrictions that I know of for foreigners taking their dollars back out of the country.....strip searches have yet to be put in place.
I don't see why it should stop you from visiting the country to be honest. It's us poor buggers that live here that the new measures are aimed at.

Gaucho100K knows more money talk than I do.