I did not do the Masters so I can only comment on what I've seen and heard. It seems that about everyone who was in the Masters program, applied to the DO program, and had As and Bs were accepted. I know of only two students that didn't get in and that was because they had a C average. During your first year of the DO program, you are then only required to take classes you haven't taken in your masters (basically only half). Beyond that, roughly 8-10 of the former Masters students work in the anatomy lab as TAs so they're getting paid.
There are definitely pros and cons to both but if you're determined to become a DO at DCOM and are willing to put in the work to ensure you're a competitive applicant, go for it!