Mack isn't going anywhere. They have Mack and duchene, then a drop off to landeskog and it just gets ugly from there. The avs dealing a forward because it's a position of strength just isn't a thing anymore. Raantanen has some promise. If they traded Mack for Hanifin they would be awful. Just as bad as trading Duchene for Faulk.
As far as trading Faulk, to me that ship has sailed. Needed to happen last summer for full inflated value. He was pretty unlikely to keep that goal scoring level up so now he's basically where he was prior to blowing up. A guy works hard both ways but has some limitations and is prone to turnovers on occasion. Our defense with the developed versions of Hanifin, Pesce, Slavin and Faulk is impressive and well rounded. We will soon no longer need Faulk to be what people might've thought he was last year, or maybe we're there now. He's better in the long run for not being required to be the default number one vs part of a solid and young group.
Until one of the kids supplants these guys as a top four I don't see any of them moving. Unless the trade features an obvious top 4 back.