I know this problem relates to airspace and ATC problems, not ET as an airline; but for me this is yet another reason to avoid Ethiopian, along with chicken-bus levels of in-flight service, filthy aircraft, demotivated cabin crew, and Bole International - without doubt the world's worst major international airport (yes, even worse that JFK!).
Kenya Airways is losing passengers because of its greedy ticket pricing, needed to pay for the rather grandiose new Nairobi airport, I imagine. But at least KQ operates like a proper airline, not an African bus service with wings.