As far as I'm concerned, the FDA's toxicology report (can we please not call it a study?) was fairly consistent with previous reports. The HNZ study showed 8 ppb TSNAs in the highest nicotine liquid. Since the FDA's LOQ was at least 21 ppb per TSNA, the SE carts coming up as ND (for the most part) is in line with that. Clearly, the NJoy carts were higher than HNZ indicated, but since we don't know for sure how much higher, we can't say for sure that the different is significant. 8 ppb vs 141+ ppb seems like a wide margin, but is it really? A mass compilation of all the data into a thorough study would answer that question.
Of course, do I think that more testing needs to be done? Absolutely. I just don't see the FDA's results as being inconsistent with earlier findings.