Brouwer is definitely a prime candidate for an upgrade. But I'm not sure about the final outlook for that line.
Has MJ really established himself as a guy who can make a difference in the top-6? I'm not sure. He does a decent job playing with other skilled players, but.. he remains kind of underwhelming. It's not clear that he can maintain his early shooting/scoring performance.
I'm also not sure about the whole "bring in a 2C and move Kuz to wing thing". I mean, if they manage to snag a truly good 2C, I'm not going to complain -- you can never have enough good centers (same reason why I never understood the problem with keeping MP and then Grabo from the numbers angle).
My concern is that with Caps' love for grindy players, they might bring in a center who is more from a "good/great 3C, unexceptional 2C" variety, which might help in the short term, but doesn't really provide a stable 2nd line solution long term.
And there's a lot to like about continued development of Kuz at 2C -- even if that's not necessarily his permanent spot. I do think he is getting a bit more space and a bit less punishment there, and learning a ton overall. And I am not sure that he can't turn into a good 2C himself...
I guess my feeling is.. I'd only move Kuz to wing if I were confident that i had a 2C who could really play well with skilled wingers.
Would be nice to see Kuz and Bura together on the 2nd line at some point, especially if they could upgrade Brouwer to a more skilled banger.