Carlo is certainly interesting from a Vancouver perspective. Especially in that he's not just a pure rental that they wouldn't be able to re-sign for next year. Definitely feels like a Tocchet/Foote style defenceman.
Frederic is also interesting, but probably not something they really need. Makes more sense to probably try for an actual Top-6 Forward that bumps some of that depth back down the lineup. They've already got some capable Bottom-6 depth, in theory. And he'd be pretty much a pure rental. He's also probably exactly the sort of guy that contenders will "overpay" for at the deadline.
Coyle is such a tricky one to slap a "value" on around the league. Had such a terrific year last year, but looks poor this year. I do think there'd still be a market for him, but it might be "selling low" prices, since it's hard to see why he'd have fallen off so badly, so suddenly. He was probably never really quite as good as his results showed last year...but he's always been much better than he looks this year.
Peeke...seemed to find his game a little bit, but then just kinda lost it again? Based on the price for him out of Columbus...i kind of doubt there'd be much of a pricetag on him. Maybe a team picks him up as a bargain bin deadline depth piece...but with his AAV, i'm not even sure that appeals to contenders. Maybe a bubble team with a bit more space to spare?