A cold-weather replacement for Canada's Kingston class

What should replace the Royal Canadian Navy's Kingston-class ships?

A larger, modern cold-weather ocean-patrol vessel is preferred to a direct like-for-like replacement.

The Kingston class's minesweeping role and modular payloads are the starting requirements for a replacement. The preference is for a larger, more modern ocean patrol vessel suited to Canada's operating regions. A capable patrol ship is treated as a useful addition to a two-ocean navy with High North responsibilities. That judgment contrasts with the Royal Navy's concern that powerful patrol boats could become political substitutes for frigates and destroyers. The proposal therefore depends on how the extra hulls would fit into the fleet, as well as their individual capabilities.