According to the acceptance grid OP likely has around a 70% chance of MD acceptance... That's about the same as a candidate with a 3.7/512-513..... I would never advise a 3.7/513 candidate to apply to DO schools the first go around.
OP has a 523+......... I mean.... come on... a 3.3/523+ has zero business attending a DO school. The difference in opportunity is just too big in my opinion. Look at it this way, I am heavily considering a gap year to do research and make connections to better my chances of matching my field of choice. If I were at an MD school I would not need to do this with my current academic/research profile. OP is putting in the effort up front to get into a school that will provide them the best opportunities in the future. Do it now or do it later, sacrificing a year of attending salary might just happen either way. For me the opportunity cost would be worth it.
I'm not sure they do, you would know better than I, it was simply a consideration.
Regardless, I think we are in agreement that the last thing OP needs to do is rapidly apply to numerous DO schools at this point where there is a high likelihood of some crappy, new school trying to snag him and he gets locked into a bad situation that will drastically alter his career. OP needs to wait this one out. I think we also agree that this next cycle OP needs to apply very broadly to MD schools and also about 10 DO schools if this cycle doesn't work out.