I think that's an inevitability against Carolina. I like Chytil, but he'll be in tough to matchup well against Trocheck-Necas-Niederreiter.
I have a good feeling about the Smith-Trouba pair. Something about it makes sense to me a lot more than Skjei-Trouba. My feeling is that Trouba struggled in large part this season not because he was being asked to play this big shut-down role but that the responsibility implied his changing how he has always played. The emphasis was on his physicality and tenacity, which are real strengths, but Trouba's been an excellent puck-mover in his career; he's not quick, but he's like plenty of big d-men in that when he gets moving he can carry the puck very well through zones and can make plays on the rush—something he wasn't doing all season.
It's not that I think Smith-Trouba gives a more shutdown-pmd formula, but that both guys have similar strengths, and both have been humbled a lot this year. Rather than changing how he plays to make it work with Brady, Smith is sort of sent in there to support Trouba. I think Trouba gets to touch the puck more, gets to be the skater of the two, and especially, I think B.Smith is A LOT more willing to take a hit to make a play (even if he's not the best at making plays) than B.Skjei, and with Carolina's forecheck, that could make a huge difference for how well this pair performs.