I wonder if it is possible to figure out the tech problem based on symptoms.
I see that the majority of complaints are about eyestrain and/or headache.
They accompany all the complaints and foremost complaints on flicker or BVD.
Symptoms that are rarer: red eyes, increased light sensitivity (not migraine-like).
Are they specific to one or a few problems?
If you have these rare symptoms, could you please specify what problem triggers them (or what do you suspect) and what are your symptoms exactly?
Maybe we could build some meaningful classification of symptoms.