No immediate change for existing pilots means there is no safety case to alter the status quo. It's an admission they got it wrong.
Pooshan: Only this morning, I saw a pilot with two heads and two bodies!
Skull: Two pilots standing next to each other?
Pooshan: Yes, I suppose it could have been.
Skull: In case there is an epidemic of double vision we must alter things to make sure. Sort it out will you old man!