The next build after the Polar Class is 16 hulls, so the design bureau will not have a lot of work to do. Unless they contract out their expertise to other countries that want to build their own hulls, but don't have an experienced design team. Even if they get the Corvette design gig, that will extend their work for 2-3 more years, then the same issue pops up. Canada could ask them to design a bunch of small ships, like a sub rescue ship, Mine Clearance vessel, AOP's replacement, Improved JSS, while marketing their skills abroad.