It has been said that they have pushed the current hardware as far as it would go (hence no OB or USB audio, memory limits, etc.)
So if they want to add those features, they would have to start over, with new hardware.
My feeling is there won’t be a Octatrack v2.
Rather a completely new product, that hopefully has many/most of the features (or similar) that people love about the OT, with a few new surprises.