I think the best move for the team is to do next to nothing. If you can offload some unnecessary players for late round picks, great, otherwise just stand pat with what you have.
The cost of guys like Kesler and Edler will be our youth that has resurrected our season (Nyquist, Tatar, Sheahan, Jurco, Dekeyser), and neither would make us a significantly better team when you subtract the guys it would cost to get them here.
Trades are good when you're looking to add that final piece to a cup contender, or if you're looking to blow things up and start over. The Wings aren't in either situation. They could possibly become a cup contender should a bunch of things work out in our favor but realistically we should be happy if we are able to make the playoffs considering the injuries we've had to deal with.
This is why we make a deal with Buffalo and not Vancouver. It would only take picks and prospects, not roster players. sure they'd probably have to take 1 or 2 of our bad expiring contracts as well (as they'd probably need to to stay above the cap floor anyway if they sell off everyone).