They almost did. Laurent Kabila (the father) came into power with that agenda however he made the mistake of coming to power with the help of Rwanda, Uganda however was killed because he wanted to cut them off. Rwandans and Ugandans wanted positions in the Congolese govt. especially among security and intelligence positions in addition to other influential positions in exchange for putting Kabila into power. Kabila, wasn't having it so they murdered him and it doesn't help that genocidal maniacs like Kagame are the poster boy for development (invited in international conference and prestigious institutions of higher education like Harvard, Oxford etc... to talk about governance and development) although there is no dissent in that country and political opponents end up missing/dead and Tutsis are a minority, and he is the US' specifically the Clinton and Obama Administration's favorite due in part also that Kagame has been able to exploit the West's guilty conscience on not intervening during the 1994 genocide.
One positive thing about DRC (a country of 80 million) is that the level of tribalism is very minimal compared to other African countries. You can run into any Congolese, and they speak Kikongo, Tshiluba, Lingala and Swahili (at least two of the four main languages) in addition to French and the country is over 90% Christian. They also intermarry like crazy among the different ethnic groups. There is definitely a sense of nationalism. Congolese are getting even more politically mature as they are beginning to understand that Congo's problems is a problem of occupation and foreign aggression by the East African countries (Uganda and Rwanda) with the help/approval of Western industrialized countries in addition to an extremely corrupt political class willing to sell out their own people for foreign interests. A strong Congo means it's game over for its neighbors whether it be Angola or the aforementioned east African countries and international community.
Etienne Tshisekedi died this past week. Tshisekedi was a staunch political opponent since Mobutu all the way up until last week. His party UDPS is by far the most popular party in DR Congo by a mile and it cuts across all ethnic lines. His party is responsible for Kabila having to rethink changing the constitution by introducing a referendum that would allow to go beyond his term which expired last December. The thing about Tshisekedi and his party is they have never picked up arms and always led a nonviolent movement in a country where power is obtained through the gun as a result he was never able to ascend to power or become president despite being the most popular politician in the country's history outside of Lumumba.
Tshisekedi died in Belgium last week and was responsible for an agreement that would name the Prime Minister from his party and other key cabinet positions from his party while elections will be organized in December of 2017. The enforcement of this agreement could be a game changer for the country. Kabila has lost all legitimacy even the international community is turning on him even though he lost his elections in 2011 against Tshisekedi but due to massive fraud he was able to pull it out while the international community looked the other way. I think a change in the political class and governance definitely will go a long way but then again that's with all of Africa.