I emailed Pioneer Support asking them about the status of AVICSYNC and if they had abandoned the feature. Below is their response.
Thank you for contacting Pioneer Electronics (USA) Inc.The AvicSync app feature has not been abandoned, we simply wanted to makesure that the current NEX units had the option for the feature by the timeit is released which at this moment looks more like around the end of thecalendar year. Registered users should be the first to receive notificationon the features release as soon as any updates or information becomesavailable.DaveProduct Support Representative
Well, at least they gave some kind of answer.