I think the Pens play a less risky game without him, the kind of game they need to play to win in the playoffs. I agree, he feels more like a luxury than a necessity, I feel as though Despres would be more valuable in the top 4 than he would be right now. He's the best trading chip the team has to acquire a 1st line winger and finally put an end to "Sid needs a proper right winger!" talk.
Sure, that may very well be the case. But until such time as we actually decide to trade him (if it happens at all), and once Kris regains the level of play he's shown us over the last few years, we need to view and incorporate his strengths and attributes into the game plan for our team. As long as he remains here, he will be an important and valuable member.
With that said, and Letang's individual strengths & weakness aside, I do not believe that having an elite point-producing Dman is a luxury. If you have a guy who's a liability (i.e. M.A. Bergeron), then he's simply not a good player overall and you wouldn't want him on your team. But virtually every team that is considered a great team, or every team that has won a Stanley Cup in the last few decades, has had at least one Dman on the back end who can be a big contributor offensively.
As I've said, I would not close the door on the opportunity to acquire THE right player in a deal for Kris, but this team absolutely does need an elite offensive Dman. Nisky and Martin have been nice contributors, and Olli and Pouliot have great potential, but whether it's been a Goligoski, Letang or Gonchar on this team, or a Keith on CHI, Chara on BOS, Doughty on LA, Pronger & Niedermayer on ANA, Lidstrom & Kronwall, etc., you almost certainly need this element on your team.
I do not view this as a luxury, I view this as a necessity. You can debate whether Letang is the right guy or not, but we need that type of player; and if we traded Kris tomorrow, we would be lamenting for the next year or 3 of how we don't have an elite offensive Dman, unlike all of the other top teams in the NHL, now, in the past, and in the future.
So if we were going to trade Kris, we had damn well better make sure that the forward we were going to get in return was going to provide THAT MUCH offense, so as to off-set the fact that we wouldn't really have that legit offensive Dman. Now, that is possible, but we're talking about players in the range of an Evander Kane, Jordan Eberle or Taylor Hall, Jamie Benn, etc., and nothing less. I'm not saying we could get any one of those players, but I'm saying we would have to get a guy who has minimum 30+ goal & 75+ point potential -- and given Letang's age, upside, popularity and the age of our core & window of contention, that forward would have to be someone who could contribute at that level for the next 8-10+ years.
So finding the RIGHT trade for Letang may be possible now and is probably even more possible in the summer, but if we ever make that move, we better make sure we hit a home run. And that means being as patient as you have to be until you find that particular player.
Edit: And I don't agree with JTG or others who may think the ideal window to trade Letang has passed. I unequivocally believe that his value is higher now that he is locked up for several years, and he can only submit a list of 12 teams he wouldn't accept a trade to, which gives us 17 other teams to negotiate with. And even still, we've seen in the past players waive to go to those teams if asked or convinced. I'm not worried about this issue at all or finding enough teams to create a bidding war if we truly decided to shop Letang. But like Jacob believes, I think we would try to exhaust several other options before resorting to this one, for all the reasons mentioned in this post.