I don't know what your expertise is in, but it certainly isn't in ASIC design and I'm guessing it isn't in any branch of engineering.  Delays occur at all phases of a project.

Everyone with a preorder entered into a contract.  The terms of the contract dictate what is late and the penalty for being late.  If you cared so much about it being a few weeks late X number of months ago, you should have insisted on a better contract or not taken the deal.  But you didn't, you accepted the offered terms.  And somehow I doubt your estimates for future bitcoin value and future network difficulty that you made at the time of purchase have hit the nail on the head.  There is a range to all future predictions and anyone with bitcoin experience should know this range is pretty wide - whether it is miner development time, or difficulty, or USD conversion rate.  I would say the development time is still in a range that is pretty reasonable.  If it hits Feb without shipping, that starts to stretch the reasonableness.