He'd be a great fit there too but you have to think their prospect capital is starting to dry up, the Penguins have been dealing picks and Prospects for years, which is fine because they have won several championships but at some point the prospect pool does dry up.
Pittsburgh has to be getting close to that
We are, again you have to keep pushing while we have prime core players. Such as Crosby, Malkin, and Letang. As well as players like Kessel, Dumolin, and Murray. But the prospect well is pretty dry. There are some undrafted guys in the system that show some promise on defense, but they will likely never develop beyond #5/6 guys. At best #4's. Then a handful of guys that look to develop into bottom 6 guys like Angello, Olund, Blueger along with some others. For all of our forward prospects its not realistic to say any of them will develop beyond that of a 3rd liner at the NHL level most likely potential 4th liners, pretty hard ceiling for the whole group. Then the group is rounded out by Jarry in goal. Not a whole lot there. Pretty barren cabinet.
We do have every pick in 21, and every pick except for a 2nd in 2020. Missing 3rd and 6th in the coming draft but have extra 4th and 7th rounders . So we have stuff we COULD trade. I don't know if we should be paying what it would cost to get Duchene though. Everyone want to collect hockey cards when their team is a contender and trade everything in a "shut up and take my money" kind of mindset. But that does not always work. You have to pick the right players at the right costs or at risky costs you are willing because you know the player fits the team.
I do not think Pittsburgh would be the team acquiring Duchene. Could they? Sure. Will they. They'd be putting a lot of the tradable poker chips they have remaining into the middle of the table to pull it off and the smarter move would be to keep doing complementary trades for the next few seasons that are more cost effective to try and get the core group of players names on the cup again.