Well I don't know if they want to change it and how far they will go by changing it, but I do know from reading the incident report and talking to the AOPA and the Association Colors in Cockpit, original founded in Australia by Dr. Arthur Pape, and now there is another one in Germany founded by the same reason, that it is questioned that this accident really happened due to color vision.
The accident happened during the night, usually it is way easier to see PAPI and VASI lights then. Also both, the Captain and the flight engineer reported to the NTSB that they saw always the right order of colors, white, white, red, red...
Also an accident never occurs due to one mistake..., there is usually always backup, in this case the captain and the flight engineer, who would have said something if they would have seen that they were to low, because it is their life too.
But I guess this topic has been discussed in this forum, so I won't write more about it.
There is actually an ICAO medical standard, but it is just saying what countries need to have in their medical exams in order to meet the ICAO requirements to be a member of the ICAO.