I'm assuming that you mean that Haiti is the more wicked part of the island with the DR being the less wicked. There is slavery existing today in the DR, I've seen it. The Slaves are Haitians.
The DR is doing substantially better in large part because of the fortunes made by Dominicans in the cocaine business here in the US. These drugs have destroyed millions of lives and families over the past thirty years but have made thousands of Dominicans wealthy beyond our comprehension.
Crime is so rampant in the DR that our State Department warns tourists against leaving resort areas during the day as well as after dark.
Oh, santeria is not nearly as common in the DR as voodoo is in Haiti but it is deeply ingrained. They are two sides of the same animist coin.
Evidently the flaunting of satan worship in Haiti pushed things a bit more over the line from God’s perspective.
Assuming your assessments are accurate, the DR will get it’s just due in due course.
It would be interesting to know what percentage of the populace is how immersed in worshiping something/someone other than God Almighty.