So Aregawi was busted for meldonium, as surely none could have missed. Right away there was an outrage (very understandable) of people demanding life-time bans and to bump Jenny Simpson to gold in the Moscow 2013 WC. But, ponder this:
Say Aregawi only used meldonium, and no other PEDs. Meldonium was first added to WADAs prohibited list on January 1st, 2016. That would mean that Aregawi was not in breach of any WADA/IAAF rules up until that date (given meldonium was the only substance in her system). This would further mean that Aregawi was "clean" when she won the WC 1500m final in 2013. Sketchy? Perhaps, but perfectly "legal". Therefore, there should be no need for Aregawi to return her gold from 2013.