This trade is just silly. Not from a value perspective, but from a "this deal has zero chance of happening for many reasons" perspective.
First of all, in order for the Canes to compete in the current environment, they need players producing on their entry-level contracts, and they need guys willing to sign long-term at reasonable rates once those deals expire. Svech and Pesce fit in perfectly with the way a small-market team *has* to do business. Trading them for Marner hurts because it absolutely blows up the Canes' process. Svech (a 2018 pick) may or may not develop to Marner's level (a 2015 draftee), but the Canes simply can't afford to give up the three seasons of cost control between the two players.
Secondly, both the Leafs and the Canes have developed a bond with their high draft picks. Lots of money has been spent to market them. Fans have purchased merchandise, etc. You simply can't convince us Marner is better than Svech, and we can't convince you the other way. These players never get traded because their teams trust their scouts, are happy with their players, and at 18 years of age, they have only scratched the surface of what they can be. Plus, Peter Chiarelli isn't involved with either club, so it won't happen.
If you want to get into value, let's keep in mind that Svechnikov is *still* 18 years old. At this point in Marner's development, he was still playing for London. Svech projects to a 20g, 18a, 18-year-old rookie NHL season in 14:42 of average ice with 201 shots on goal, all with horrific linemates (put Marner with Jordan Martinook and Brock McGinn and see if he can put up 100 points). He's tracking perfectly toward his projection of being the next Marian Hossa. After spending a season playing for Portland (WHL), Hossa turned 20 halfway through his rookie season that saw him put up 15g, 15a and 124 shots in 60gp (so, figure 20g, 20a, 165sog over 80 games).
So, why would Carolina trade an 18-year-old Marian Hossa *at all*? And that doesn't even get into Pesce. Like I said, Marner's great, but he's staying in Toronto. Carolina thinks they have something great in Svechnikov, and he's staying in Carolina.