If you want DO residencies, ANY DO residency in ANY specialty, audition rotations are important and therefore having two months blocked means 2-4 audition rotations you cannot do.
For MD residencies, it doesn't affect you at all because they do not interview people based on who has rotated at their site.
I already said it in the thread: July is always open for everyone, meaning that if you want a letter from a specialty rotation, you have the opportunity of obtaining one before you head off to a primary care clinic to practice medicine on the ungrateful Spanish-only speaking medicaid population.