If by “inclusive”, you mean “increase the number of low income students attending popular colleges”, it has likely made little difference, one way of another. ED admissions also likely made little difference in the chances of an individual URM to be accepted to a popular college. As more students apply to these same set of already popular colleges, the chances of individual URMs drop, but that particular process has little to do with ED applications.
What ED does which reduces inclusivity, is that it provides a way for students who apply ED to substantially reduce college application angst by getting it done early, while, at the same time, increasing their chances at their top choice of college. However, since applying ED does not really work for kids who need to compare financial aid packages, it is mostly kids from wealthy families who benefit from these advantages of ED.