Over the past two months I've had the new seats a couple of times and thought they were just fine, better than expected actually. That said, I've generally been sitting in Plus, not in an exit row.

I generally don't book exit row seats. Last time I flew in one was on an AC A321 traveling YYZ - YVR several few years ago, and it was among the most uncomfortable (least comfortable?) flights I've ever had. Haven't booked an exit row since.