If this is correct information it is certainly very interesting. However, I don't think you will find many respondents in this section as I would imagine those that had failed a class 1 for any reason would probably not continue contributing to the site.
That said the EEG is useful in determining the presence of subclinical neurogenic features that might manifest later on by expression of clinical symptoms. I would imagine though that most neurologists would agree that if you're fortunate to catch (for example) a paroxysmal burst of delta activity in the narrow window of opportunity you have in a short test, there would be other clinical signs extant to deduce the presence of a causative lesion. Which of course then begs the question why bother?
I would counsel the best course of action is to drop the test all together and that the only time it is requested is when there are elements of doubt from clinical history. In asthma history for example the medical examiners would (most likely)require more thorough lung function analyses before issuing the certificate.
Sorry this is a bit long winded.
As an after thought though, if the test is removed I feel the cost should be reduced appropriately.
Kind regards
Nigel