1. Would you mind trying ducting the cooler to the rear exhaust? A simple cardboard channel might be all it takes to make it the semi-passive solution of choice. It is also shaped in a way that makes ducting very easy.
In the case that SPCR tested this cooler with in "passive mode" it would be a cooler and quieter system to have the "only fan" as the CPU fan, and if possible have it blowing upwards (if the cooler can be oriented this way without it interfering with other components) towards the large open twin 140mm grills, that would keep the CPU temps in check and would be quieter than having a fan on the CPU and one on the case, and even better from the perspective of temps vs noise as the fan on the CPU heatsink would likely be less audible than on on the case. If you then wanted to duct it you are welcome to try.
2. Wouldn't reversing the orientation of the rear fan (make it an intake) improve cooling performance? I remember Scythe recommending positive pressure for Ninja's passive operation.
It would still be an inadequate cooler vs the noise it created. i.e. for it to cool well enough the case fan would have to spin faster, which in turn would make it noisier at a given level of cooling vs using the included CPU fan - a classic example of where more fans are quieter than fewer fans.
Come on guys, the rep tells you to throw anything at their product and see how it performs, and you go easy on him?
Test it with the hottest frying pan you got!
With the CPU temp fast approaching 90C you don't want to add another 20% of CPU heat to the mix unless you don't mind frying an expensive component.