I don't think Chen understands device strategy, or cares much for it. Because every BB user has been asking for the exact same thing you just mentioned -- for years -- and they still haven't done it.
It'll never beat Apple or Samsung in popularity. But if they just released a single solid high-end Android phone with a real BlackBerry keyboard every two years, that product line would quietly print free money forever. It's a niche product, but a fairly large niche.