Sorry to respond so late.
Instead of adding schools, I'm actually considering removing the schools that heavily emphasize research experience. (ie. Harvard, Stanford, Duke)
This ties into another concern I have about my app. I think my EC's really don't compare much to the average matriculant at many of these schools, especially the duration and variety of clinical and research experiences. Most of those included occurred in the past two years (because that is when I initially made a hard dedication to medicine). If you took away the GPA/MCAT, I feel like my app is average at best. The more I look around, the more discussion I see indicating that stats only really get the application looked at, but everything from then on out is based on your EC's.
I feel like the list I have now is too top-heavy and, for financial reasons, I would really like to adjust it to include schools that fit my standings EC-wise.
But maybe I'm just being neurotic or dealing with some sample bias and overrepresented extremes (Please tell me this sentence is true, lol).