I hate to do this since the thread is currently full of riveting Washington Capitals discussion (thank goodness there aren't any charts cluttering up the current discussion about mods and ignore lists), but have some more analytics:
Caps’ Dynamic Duo is Lying in Wait
I might post more in depth in the analytics thread, but the TLDR is: Ovechkin and Kuznetsov have formed a formidable duo this season and one of the best across the entire NHL, albeit with a small sample size. Offensively they have been excellent, and defensively they have more than held their own.
It's reasonable to keep Backstrom and Ovechkin together for now since they are winning, but it was very noticeable how much better the Capitals played against the Islanders once Kuznetsov and Ovechkin were playing together.