One HA coach gave us a contact in the financial aid office, and they did an estimate. Each school calculates things differently based on the same financial information, with sometimes wide variations, so you really do have to ask each one. Two sons next year at two schools, the EFCs differed by several thousand dollars.
I do think that the rigor and challenge of coursework is greater at schools that are more selective, and the students with whom you do groupwork are likely to be more capable and focused. If baseball reduces the time available for out-of-class educational activities (jobs in labs, clubs, or serving as TAs, for example), then the classes themselves are more important. However, what any student gets out of an education is what he makes of it.