What are some of the other CNS symptoms?
VENTID, as posted above, as well as myopia (different than the V in VENTID)
You aren't wrong in saying that a seizure at a PO2 of 1.0 is not reported, but I would be careful about reading past the data. If you remember, the OP had concluded that O2 clock on the three computers used on a dive could be safely ignored. While that might be true in retrospect, for that specific profile, it's not a generalizable message.
I understand that the thresholds for ox tox are hugely variable, and that the pathophysiology is incompletely understood. But I also understand that it's very hard to do good science with human data for something like this. Even chamber data might not correctly model dive experience, since immersion seems to be one of the things that significantly changes the threshold for CNS symptoms. Cumulative O2 cell injury at lower PO2s might not cause seizures, but it might change the threshold downstream when switching to a richer mix, going deeper or with recompression. Maybe a seizure in a dry chamber is harmless if you don't hit your head, but that's not the same thing as saying that ox tox can be ignored and has no long term issues as long as you don't drown.
I'm far from an expert in this field, but since TDI, PADI and Shearwater all still use the time and PO2 model to track non-pulmonary exposure (NOAA or otherwise), I'm uncomfortable saying that time at PO2 under 1.4 is irrelevant outside of pulmonary issues.