I read it a bit different. Boeing wants it settled ASAP, but they want it on their terms.
It's no secret that corporations don't like unions. This is a horrible time for IAM to strike from Boeing's perspective, and the management team has been playing the PR game for 3 or 4 months now, hoping to capitulate IAM into taking the contract Boeing wants. And yes, that contract includes language that allows them to outsource more of the work and have those outsourced companies do their assembly in Renton/Everett.
As for moving manufacturing out of the Puget Sound, I don't really see it as viable, at least not without bankruptcy being involved or capitulating the unions. Moving corporate to Chicago is easy; office space in Chicago is the same as office space in Seattle, and most of the "knowledge" in running a business is easily replaceable in a big city. The facility in Everett would probably cost a $1-2B to duplicate; plus you need to find 30,000 people to do assembly, train them, etc. Even with generous incentives, Boeing would be lucky to have 20% transfer. The loss of knowledge would cripple the company for a decade at least, which would be long enough for EADS, Embraer, the Chinese companies, etc all take over the 737 market and figure out carbon fiber to wipe out the 787.
FWIW, with respect to outsourcing, most of the delays of the 787 are directly related to having companies who've never built an airplane trying to build an airplane. That, and a ludicrous time frame from the outset.