By Moving off campus, particularly senior year, is a logical step in the learning process. Susquehanna's desire to keep students on campus is shortsighted and motivated, at least partially, by a desire to keep the coffers full.
Dorm life is, well, dorm life.
Most students are unlikely to find themselves in a similar living situation after graduation. Even Sassafras housing, specifically Issacs and Roberts Houses, while better than your average residence halls, are, at heart, glorified dorm life. All other arguments aside, only 32 students get to take advantage of this step-up in the world. Admittedly, this number will increase to 64 when the second incarnations of Issacs and Roberts materialize, but that's still only a fraction of your typical senior class. All of these are skills you need upon graduation, and in spades.