It could be they had a problem in production mode and cancelled the option. Maybe that is why they've been delayed? I don't know. I do know that, when I used to race jet skis, this sort of thing happend with a ski that was made specifically for racing. The production unit turned out to be very different than the prototypes and still and issues. Several of the suppliers were aftermarket companies (liek
Brembo)who typically don't make a ton of the same part. They had quality control issues when faced wtih the job of making a large amout of product very quickly to be put into the MFR process. Id didn't work. Many of the parts failed on production units and let to a huge QC problem for the manufacturer.
I don't know if this is what is happening here, but it is a thought. Aftermarket companies are not used to producting product in large quantities in the time frame a large manufacturer like Ford would demand.