Carolina is winning and super entertaining to watch. They likely have to make a decision at some point, but they really aren't in a rush to do it in season unless something they really covet becomes available.
The Leafs aren't moving those types of pieces yet, but it could change if Nylander's contract hits a real impasse near the end of November, then Carolina seems to be a team that is aggressive and could very well offer a package centered around Faulk.
What is more likely, is Carolina can just be patient, play things out, and this summer decide if they would rather extend Falk, and potentially look for a forward upgrade using Pesce, or trade Faulk and get value for him from a team that will want to extend him. Either way, since they aren't up against any real deadline in the short term to max out the value they get on Faulk, I don't see them as being in a rush to move him for pieces they don't highly covet.
I am a little curious as to what the Carolina scouts were looking at in Toronto, as I know they would be highly interested in Nylander from the rumors out there, but if they were scouting Toronto's line up it likely means that there was talk of some other players, either because there maybe were some preliminary talks on a bigger trade, or the talks about Nylander lead to at least a discussion on something likely smaller.