I feel like DC does a great job when it comes to having a diverse universe, often times a better job than their competitor, Marvel. The one thing that irks me though is that they seem to have an unspoken policy where only one character from a specific minority group can be pushed at a time. For example because we have Cyborg that means no John Stewart, Vixen or Black Lightning solo, because we have Kenan Kong that means no Ryan Choi, Katana or Black Bat solo. The exception seems to be Latinos since both Jessica and Jaime have books at the moment. Then again Jessica is a Geoff creation and Vibe, El Diablo and Kyle don't have solo books so maybe it is true.
Still you can't deny that DC atleast puts an honest effort in building a diverse universe! They've pushed Cyborg, Blue Beetle and Katana both outside comics and in them for years now!