Getting a US tourist B1/B2 visa for the average middle class Dominican citizen has not changed much at all in more than two decades.
Getting a US tourist B1/B2 visa for the average low income Dominican citizen also has not changed, still is a lottery win.
As per facts and figures, the DR is on the average less than 9 to 8% of visa overstayers, which includes those that arrived on B1/B2 visas but adjusted their status via marriage, work, family, etc... The rest are overstay violators.
A recent report from the DHS on the countries that abuse the visas was published recently as the new administration has put new restrictions on those which have a high rate of overstayers. The DR is not in that group, never was.
Some data here:
https://travel.state.gov/content/tr...l-reports/report-of-the-visa-office-2017.html
The ones having a hard time getting US visas will continue to have the same problem, unless their economic conditions change.