While everything mentioned regarding campuses is correct, it is important to note that the Eastern method of third year clerkships is not the same as Morgantown or Charleston. Rather than rotating through one block at a time, you rotate through a combined two or three per semester, each weekly. So one week would be Surgery, the next week would be Pediatrics, the next would be OB/GYN, then back to Surgery, etc. Then you take all three subject exams at the end of the semester. (I am not sure of the actual clerkship schedule but it is an example.)
Ask yourself if this type of fragmentation is logical.
Additionally, switching campuses is not easy. It happens, but it is rarely straightforward.
EDIT: I felt a little guilty about injecting my opinion into the Eastern campus. My roommate's girlfriend went to Eastern and I asked her about what I said and how Eastern really is.
"Fragmentation", while technically correct, is not the true Eastern spirit. It's more about the "continuity of care". Eastern is best for people who learn more hands-on and who are, above all else, flexible. I am more of a rigid textbook person, where if I haven't seen it in a textbook or I don't know my day-to-day schedule, it's not going to work out for me. Morgantown and Charleston by virtue of their block system are more of the textbook approach: read about it in the book, apply it to real life week after week, until you are done with the block. She loved Eastern because she is not a textbook person like me, she wants hands on and is unafraid to say "I don't know".
An anecdote she told me was that she was rotating through OBGYN, Pediatrics, and FM. She saw a patient deliver a baby, two weeks later she saw them at a checkup, and a few weeks later at a FM visit. It is possible, though highly unlikely this would occur at Morgantown or Charleston. This exemplifies the continuity of care. Sure, she may not have known what she was doing at any of those time points as they were early in the year, but she saw a patient from three different services.
Perhaps I was hasty and too judgmental in my opinion of the Eastern campus.