I guess it depends on how far it goes. I just worry when breweries become macro in size that their products will be macro in quality. It signifies a shift in how the business is operated, and it might not be for the better. It might be awesome, but it already IS awesome, so in this case I fear change.
They talked quite a bit about this when I was at Beer Camp a month back. There's no way they aren't going to grow, so you might as well get over that fear, Tom! Thia is the most logical way for them to accomplish that. It's lees expensive and more eco-friendly (in keeping with their philosophy) than shipping beer across the country. Let's face it, SN is a business and as such wants/needs to keep growing. Based on what I've learned about the company and their mindset, I'm much less worried about expansion from them than a company like, say, Ninkasi.
Have not read the whole thread, but this has been in the news for a while (East Coast Brewery). At the NHC, Terence Sullivan was asked about it. His response is "no decision, Ken's wife still has to decide". What I read into that (this is my SWAG) is that she had input on where she was going to be living, as Ken would be there during the construction and start up. The SN quality ethic comes from Ken Grossman, so I am not worried.
New Belgium is also going to do another brewery in the Ashville area from what I read.