Mele Zenawi understood this but his solution (federalism) was not fully implemented. You have federal gov who are not elected but appointed. You have gov main party winning by 100%. Pure mockery of democracy that even Sadam Hussein and those arabs dictator couldn't pull.
Rwanda and Ethiopia have to deal with the elephant in the house...small tribal elite controlling the country. The economy has been booming but all it will take is a coup or violence and you're back to square one.
This is where countries like Kenya, TZ, Zambia, Ghana, now Nigeria and are far ahead. Fix democracy. Only very few countries can survive a dictatorship and they have to be homegenous. Of course democracy in heteregenous country like kenya breed tribalism but you can copy from US' really strong consitution, institutions and checks and balance you can protect the right of minorities.
The problem with copy pasting, they thought it would be easy to replicate everything the china man does. The government may decide to beat the opposition into pulp but they will lose the support they are enjoying from U.S.A. Something has to give, they either have to broaden the democratic space or become a hemitic economy like Eritrea and North Korea.