Shipyard Build Time

It was much higher in the initial stages of the opt-in patch.  It used to be 40 before the patch, was raised all the way to 250 during the first part of it, and is now sitting at 150.  Basically SD felt shipyards were far too easy to build. Now they are trying to find the sweet spot balance wise.

Seems to me that a year would be the most reasonable, long enough to be a pain but short enough to be possible. If they are going to take so long, why is the quick cost so low. It is not even close in relationship to build times for similar cost items.