so, how do you "save atlantic canada"?
you don't. you accept that the economic base in the region is relatively small due to the geography and the climate, you let the region exist as a low-rent haven for artists and retirees and you give control back to the indigenous groups, where requested.
the best thing that the government can do for this region is back off and leave it alone.
and, if climate change opens up more economic opportunities in the long run, people will come on their own.
the liberals are supposed to do better than this.