We don't need to blow up this team, and we don't need a major rebuilding... We need a little more than a tweak... We also don't have to clear house in order to lose... Quite unfortunately/fortunately, if we want to lose, all we have to do is start Gerber... It may sound like a joke, but it is true.
We need one of those Philadelphia Flyers rebuilds; where they were crappy for one season, but then made the playoffs the next. They had a couple prospects mature (Carter and Richards), signed a couple of solid free agents (Briere and Timmonen) and acquired a respectable goalie (Biron). But they kept their team intact for the most part.
Granted we don't have as much money available as they did, but it should still be manageable. Karlsson will hopefully be ready. He looked good in that World Juniors game, although the tournament will be a better judge. He seems to have put on some weight, he didn't look 160 lbs anymore. Zubov should stay up here the rest of the season, let him hone his skills against bigger players and will be set for a breakout next season. And we'll have to wait and see how Elliott progresses.
As for the Spezza situation, in order to maximize return, trading him at the deadline would be the best. I don't believe that Spezza for Bogosian and Atlanta's first is realistic because you're asking Atlanta to just trade over the future of their team: trading a 'franchise' D in B and potential 'generational' D in Hedman. I believe that we could get Lehtonen and their 1st, since they are so high on Pavelec. The only question is do we want to take the chance on Lehtonen staying healthy. But this would be a draft day deal. The highest return would come at the trade deadline, as last year Hossa fetched Esposito, Armstrong, Christensen and a 1st, for a rental. And the year before that, Forsberg fetched Upshall, Parent, a 1st and a 3rd, also for a rental. Spezza should in theory fetch more as he is younger, and is signed on long term and a reasonable contract.