From what I've read Kessel' poor conditioning is over stated. Yeah he ain't cut but that doesn't mean he can't do the job.
Kessel was top 3 in fitness testing at training camp
Having said that I don't think Treliving would trade for him. He seems like a cautious type not going for the home run like our last two GMs. If his contract could be fit in, I'd probably offer our 2015 1st and a secondary prospect.