Doughty has been the best defenseman this year SO far, and I am pretty confident in saying that.
Especially when you take everything into consideration. He's playing with a rookie partner and on a team that's trending in the right direction but is by no means elite.
Doughty leads the dmen on the Kings, in all catergories of ice time,( Even, PP, and PK) . How many other Norris contenders can say the same?
Oh and his stats are very similar to Hedman, despite being on a way worse team. Not that stats are everything.
Doughty has played really really well this year. Been dominant in both visible and subtle ways this year for the Kings.
What makes a defenseman worthy of the Norris can be a really interesting topic. I don't know if this place can every be mature enough to have a good discussion about though.
Other defenseman I have been impressed with.... Makar, McAvoy, Hedman, Faulk, Fox,
There are also some normal Norris contenders that have been a little disappointing so far this season.
Defenseman I want to see more of are.... Pionk, Nurse, and Ekblad.