I agree it would be nice to see more feedback from those being used in the wild. My understanding is that they are still fairly backordered and maybe Nauticam hasn't been able to keep up with demand. Being on backorder is enough time to change your mind and buy something else!
I would desperately like one for the caves but can't justify the cost. In aussie dollars with the extension ring and new (even cheap new) lens, it's close to $7k. I guess maybe if I sold my Canon 14mm and domes that would make a dent in the price but then I'd be shooting with the WACP on every dive, all the time. If it was to be my main wide angle rig I'd like to hear from other people using it day to day for all their diving, not just special trips or special dives.