People nitpick, find flaws in the team and see those as a reason we are not contenders, even though there is not a team in the league without them.
I've spent tons of time on these boards arguing for the value of maintaining a long-term perspective. My view on that hasn't changed, but such a perspective is flexible. Our opportunities are finite, and we have a good one coming up. Not taking advantage is another type of waste.
Plekanec addressed the major flaw in our team that could be fixed relatively cheaply. He was a huge upgrade, and as such is worth it as a rental.
I would take issue with getting marginal or unnecessary short-term upgrades for costly prices. Those are the mistakes we need to avoid.
From the selling perspective, it always depends on the price. But while JVR is mostly just a PP specialist, he is a crucial part to what is arguably the best or second best PP unit in the league. Outside Marner, he is the most involved player in a unit that scores at the second highest rate in the league, and creates chances by far more than any other unit. You don't just replace that, so the return needs to be tremendous because without that unit clicking like it does, we have a special teams problem.
Bozak is a marginal player this season, but even with Plekanec our center depth is not great. From what I've read, teams don't seem to value him, and with a bad result the center depth might be worth more.
Komarov is similar. Barely an NHL player right now at even strength, but good on the PK and still a shutdown presence. With Plekanec, he's more expendable, but it has to be the right price.