They didn't say armed. They said Navy. And they didn't say icebreaking warship. I'm not excluding that possiblity (as if you want to fight with the Russians you need guns) but there is a distinct possibility that "armed" may not reach any further than the JSS armament (with CIWS and 50 cals).
IF we're looking at submarines and more ships in the arctic for longer or year round than I can see a through line to an RCN icebreaker. I'm thinking more of a Russian style deep sea tug, to provide all the logistical and repair support for RCN ships that get into a tight spot up north.
Bunkering, workshops, chinook landing pad, hospital, sub rescue capability. Maybe more personnel carrying and deployment capability. An A-JSS for the home game.
Not saying this is a good idea or its a critical requirement, NSS II is likely in the brainstorming phase to a certain extent and I expect the crazy whiteboard ideas are leaking out.
I see this as a good sign, particularly as they are thinking about NSS II, and are going to try and deliver on that continuous build philosophy. Be willing to take some creative risk here as this moment in history requires some bigger swings.