It is an interesting list. There are some viable options on this list. It's all a question of if the rewards outweigh the risks.
If we were to acquire any of these listed, here's my thoughts:
Vanek - too much potential for Gaborik 2.0. I'm just not sure his style fits here.
Kesler - Aging, injury prone. Style fits, but won't waive to come here.
Miller - not looking for goaltender, but on the market, his playoff performance gives pause.
Letang - His health concerns are totally legit and too big to overlook.
Callahan - This is the toughest one. He's asking for the moon and is likely not worth what he's asking. He is probably the best fit for our style on the market, he's the guy the Jackets probably want the most.
Lecavalier - I personally am intrigued by this one. Yes he's 34, but he's still got oodles of skill. His wrister is still as wicked as anyone's. He's probably easier to acquire than ever before and is likely a 2C upgrade. The only way I would do this deal is if it were a swap for Umberger. Another veteran leader for the locker room that has won a cup, that's valuable in my book.
Hemsky - Skill is not the question, his injury history is. If he could stay healthy, this would be a skill upgrade option. Big problem is that his style of play is not a very good fit here.
Bolland - He's a bottom six player that believes he's a top six. Way too rich.
Umberger - Similar to Bolland, only he's under contract and is way overpaid at this point. Plays his guts out, so any team that does acquire him is going to get his best. The problem is his best isn't good enough anymore.
Legwand - Agree with the lists explanation. I don't see any reason why the Jackets would have any interest.