Almost no Kings defenseman since 2014 has looked very good. People really discount just how much players like Mitchell, Regehr, and Scuderi glued everyone together, including Doughty. There's a reason Doughty has looked worse as the veteran rather than the kid listening to the veterans. He's immature and probably always will be.
I made my peace with saying goodbye to Doughty a couple years ago. Frankly, I feel like he should be traded before he completely depreciates as an asset into his mid-30s. Moreover, I don't trust him for one second as any kind of leader in the locker room or on the ice. He's too emotional and reckless and stupid, to put it bluntly. I'm fine with guys like Brown and Quick sticking around for longer than they're effective on the ice, because I trust them as the adults in the room. Doughty? No thanks. And if he really continues to decline on the ice, he has almost no value to a rebuilding team.
There are going to be a lot of hyper talented young players in the Kings locker room over the next 2-3 years. They need to be insulated and developed the right way around the right vets.