I agree it’s not that worthy to invest AB168 with the QU. The reasons are as follows:
1: AB168 is much more expensive than the traditional analog snake. It’s half of the QU-16 mixer.
2: With the digital stage box, you don’t gain too much. You still have to carry a big metal box with cat5 cable, that may be even more stuff to carry than the analog snake.
3: It’s a waste of the on-board I/O, with AB168 stage box, it’s a double investment on preamps.
That’s why I’d rather buy a good analog snake in this case.