MD students looking to match into DO residencies will need supplementary training in OMM as I understand it, and the merger will not be fully complete for some time (AFAIK It's 2020+?). I would not worry about a "flood" of MD students into DO residencies; DO students are getting a win with the merger as MD residencies do not require additional training and it places more pressure on residency directors to take DO applicants seriously where they were not taken seriously previously (a select number of places anyways). The only people "losing" are IMGs which may be further alienated unless their institutions continue to cough up a bunch of money to buy spots (may in turn cause increases in tuition as well?).
Also of note that, contrary to what a lot of pre-meds believe, general surgery is not a particularly competitive match.
I see, that makes sense. I had a fundamental misunderstanding of the ramifications of the merger, and assumed that there would be a more immediate collapsing of matches into one, combined system.
Personally, the areas I'm interested in are not very competitive, and looking at the program rosters, there are a significant amount of FMGs, not to mention DOs, rounding out the positions. Of course, I have never been exposed to neurosurgery, but I've seen a fair amount of radiology, and had a tough enough time as a sophomore in high school to never want to be a dermatologist.
I have a sense that after graduating from a DO program, there are not that many doors closed to you that weren't already closed to you anyway. As adults, we have to realize we all have unique abilities, which means we also have some limitations. If you find that you're really good at something, and love it, by all means fight to the end to get there. Even if you don't get all the way there, with a DO or MD, you can probably get pretty close, and may be happier doing that. After you graduate from medical school (any US medical school), your ability to chart your own course is arguably greater than so many other people with just as much education. Why dwell on what you can't be? If you're not cut out to be a neurosurgeon (not OP, just speaking generally here), who says you're not cut out to be a great general surgeon, or a phenomenal hospitalist, or the best damn rheumatologist in the tri-county area?
In closing, I think Ben Carson would make a dreadful psychiatrist.