This is a bad move by Boeing, who seem to be on-track to really infuriate every employee group. This move was strictly a pay-back to the engineers for their possible strike vote. Boeing seems to care exactly '0' about their employees now; it's all about the shareholders. The balance that kept the company great for decades is gone.
I know the press release said moving the facility made it closer for the customers in MIA. I say Bull****. I've been going to the SEA facility for recurrent for over 10 years now, and it was full of Asian airline crews. Somehow, I don't remember MIA being closer to Asia than SEA.
TropicalD