two years ago they (Dougie and Slavin) weren't together until 2nd half of the season IIRC, so it's harder to say.
5v5 TOI with last year (only looked at Slavin):
Staal: 407
Svech: 392
TT: 389
Aho: 370
Foegele: 344
Nino: 334
5v5 TOI with this year (again, only Slavin)
Svechnikov: 63
Foegele: 53
Aho: 52
McGinn: 51
Nino: 49
Staal: 48
In an extremely flimsy way, this vaguely suggests that they're being moved toward more top-line time, which could possibly mean more challenging defensive scenarios.
It's hard to put this into words, but it's almost easier to play the D position when your linemates are a bunch of grinders and 90% of the time is just spent playing whack-a-puck in the neutral zone. It's different when you're out there with the top line, there's serious pressure to score, and you're routinely handling the puck in the offensive zone. One little offensive mistake turns into a counterattack with an ocean of space behind you, which is a
lot harder to handle defensively than just standing around at the blue line waiting for a dump-in. It's kind of like the paradox in football where it's way easier to play safety when the other team gets the ball in great field position. Even if your team is probably in bad shape, you personally have an easier assignment in covering a relatively small amount of space. When the other team is backed up to their own 5 and there's a golf course's worth of open field behind you, that's where you have a chance to look
really bad if the smallest thing goes wrong.
Which is to say, some of these ugly plays might be the result of defending against the kinds of high-quality opportunities that happen when an opponent is counterattacking all the way up the ice without a lot of back-pressure from the forwards. That's actually a
good thing for the Canes as a whole, even if it might mean Slavin and Hamilton get posterized more often than they used to.