I may be completely off the mark, but I suspect there are two main reasons for all the confusion surrounding Poly:
1. The sales and marketing teams at Chord forced a product announcement before it was ready, probably around 6-9 months too early.
2. There is some concern at Chord that they got the pricing wrong and they are working hard to add software value to the product to make it better value for us the end users.
The software could be regularly field updated but I suspect they want to get it perfect first time this is very very difficult to achieve, maybe even impossible. The obvious reason for this desire is that software development is very expensive, especially if its being done by and external entity.
I hope the Poly is a success for Chord like the Mojo is, but we will only know for sure after the next few months.