I wonder how long the board redesign and remanufacture is going to take after figuring out they need more chips per to meet hashrate guarantees.
If I were them, then from the viewpoint of ("need to meet a hash rate target by any means available") I would choose to ship extra single-chip boards. Re-designing is a burdensome process with no guarantee of timely success.
Unfortunately, that's not the product people purchased and as such they should be then offered a refund instead.