I watched the first 3 games and highlights from the last few. Watch the games is such a tired argument. The numbers show he's one of the worst defensemen in the league.
Plus minus is a relevant stat. People who think it isn't are stupid. It just has to be taken in context. Keith has been given very average difficulty in terms of starts and opposition. He plays for a 6 and 1 team. He's getting his head caved in. He's not good.
I have to disagree with you here. +/- is more of a team stat, and not so great for individual assessment.
Keith has really played well with Ceci and in my opinion has really settled down his play. They look pretty good on the 2nd pairing together.
If you watched the Oilers in the pre-season you would have seen Ceci struggle a bit before Keith's arrival. I was kind of worried but tried to keep in mind a player needs time to adjust to a new scheme and new teammates. These two started playing together and there seemed a lot less, I dunno, panic? in Ceci's game. No real complaints with the 2nd pairing right now.
Watching the game isn't a tired argument. Advanced stats are a tool in the toolbox when evaluating a player but those stats, and simple ones like +/- aren't the only valid way to understand a hockey player.