I've spent the last 24 hours thinking on this more in-depth and really forgot one key reason this move makes total sense and the Timing is fine.
Spencer is done in Seattle, it's simple, I said it after we stood at 3 and 5. halfwway through the season Chris Spencer's health would determine his future in seattle and two weeks later his hand was in a cast.
Why make this move now and not when the hand was broken. Simple, you were still capable of making the playoffs or at least having a winning season and Spencer despite his injuries knows the line calls for pass protection and is someone who's seen enough football to avoid real rookie mistakes. With the knowledge as a headcoach that even if you keep your job Chris Spencer is gone, with nothing more than your job on the line, Max Unger becomes the future of Seattle's center position. The Mike Gibson thing was a head scratcher until I applied the same logic to Wrotto and Vallos, you know what they can do you need to see if Gibson can become part of the competition to improve the line.
Mora made a huge error in calling out Chris Spencer's injury issue in public, but I don't think that lead to an Irrational meaningless decision. I know people say Spencer improved this year and what's funny is I thought about it all last night and they are correct to some degree, but Injury prone guys don't suddenly find a fountain of health DJ Hackett didn't, neither did Shawn Springs and once the injury bug bites a player for more than two seasons, they are an injury risk. Why would Spencer be depended upon after this season?
Why is it irrational to move on with someone you believe takes the position anyway next year?