Not on the EPRDF executive. The Somalis and Afar are called Allied parties. But both the Somali and Afar have their places in the federal government which is the executive in the country.
The Oromos are missing one very important point in federal system. A small province or region can stop the most populeous region. Prince Edward Island in Canada can stop Ontario (half the population of the country) since all provinces are equal. All nationalities in Ethiopia are also equal.
The facebook and twitter leaders of the Oromo, which the regional Oromia government seems trying to use it as well, are telling the mob that since Oromos are 40 million Oromo should be majority in federal positions. There cannot be a more stupedest argument than this.
If the Oromo take positions as per their population numbers, then there will be a 80 nationalities under them. It blows up in their face the next day. That is not how it works in any multi-ethnic federation or like UK. If one uses the Oromo logic, there would never be a Scottish, Welish..prime minister or cabinet minister in the UK, since the English are about 50 million of the 60 million UK population.
If the Oromo leaders think this works for them, they are in for a catastrophe where every other nationality will not accept their rule and of course ruling others by force is unthinkable even with 40 million of them. Even logistically their region is from Sudan to Somalia a thin twisting snaking region.
Patience is a vrtue for the Somali, which they seem to have now at the right time, since other nationalieties have already started questioning the Oromo (from south). In my view, don't panic, be prepared for worst, but do not get ahead of the Oromo. Let them lead themselves to the destination they intend.
The northern parts of Ethiopia Tigray, Afar, Agew/Amhara (except some around the capital), Benshangul is also showing patience, not reacting.