At the cost of minimum $20-30k/year. It is not easy for shops to hire staff like that, even if it is the obvious solution.
Sadowsky, Nordstrand and other boutique shops somehow find ways to be communicative. I don't believe this is because they have a full-time customer service guy: communication is often handled by the sales manager, or they spread the work around. Here's a description of the duties of one of the Sadowsky staff:
JR is part of our pre-production team and his responsibilities include body sanding, shielding, and wiring. He splits his time with the front of the house where he heads up our social media, website, and marketing.
Hell, Roger Sadowsky himself has answered the phone a couple of times when I called the Sadowsky shop for general info, and has called me directly regarding builds-in-progress.
When I was considering a custom Zon, I communicated with Martin Peters. He was immediately responsive before I pulled the trigger, but way less responsive after he collected my down payment. On the upside, he mailed me a work-in-progress pic on two separate occasions, but on the downside, he did not reply to two simple questions I asked him. That was a little annoying, but the questions were non-critical, and I decided to follow the recommendations given in this thread (and directly to me via PM): only contact Zon when absolutely necessary.
Anyway: point is, Zon has Martin as point of contact. Seems to me that shop policy is to avoid communication re overdue orders (kind of what Vic said), and overdue orders seem to be common. So, I would argue that Zon doesn't need to hire a customer service rep -- they need to hire another builder, to speed production.
A company can have great communication, service, online presence, etc. but it all comes at a cost... Fodera works with a much larger staff but their customs also cost 2x a Zon on average. Would you still buy a custom Zon if it cost you $10,000?
No disrespect, but you're cherry picking. I've ordered customs from Sadowsky, Nordstrand, Martin Keith. All are in Zon's ballpark, price-wise. Unlike Zon, all are extremely communicative -- and Martin Keith is a one-man shop.