Doughty is still good defensively, but he's starting to show his age this year.
You can see it in the way he moves. He looks old out there.
It doesn't matter to Todd though. In his view, Doughty should play 26+ minutes per night. He currently leads the NHL in total TOI by a wide margin.
Age, effectiveness, analytics be damned.
40+ games last year without him in the lineup didn't demonstrate anything to Todd apparently.
Just keep playing him a near half hour per game. That's the smart thing to do.