I agree with this and I actually think it's great for Cowen to be with Karlsson because Karlsson is the best option for keeping Cowen's troubles right now mitigated.
That said Methot showed last year, with Karlsson injured, that he's a legit top pairing defenceman. He was our MVP after Spezza, Karlsson and Anderson went down.
I was thinking about this as well. Coach could not have made the switch before this week because EK was still having problem with his own game. The timing was right for Cowen to be match and develop paired with King K
And Methot can help someone else