There is no factionalism or tribalism in the DR. It is a real country with a border that is accurate culturally and linguistically. It has old institutions that function - barely, but function none the less. It would take a lot to make the DR a failed state - Lord knows The Hippo tried!
Had Hippo stayed in office? Yes, I could see the PN continue down the road of becoming an armed criminal gang and the whole Pepe Goico narco-state thing, and then who knows. And also the problem with not registering its own citizens that continues. But even in 2004 you still could not compare the DR to Haiti, Sierra Leone, etc.
In fact, I don't understand why the DR and Colombia are on the list but Bolivia, Russia and Pakistan are not.