Never been to Briar Hill specifically but the east wing thing is interesting because that pattern comes up constantly - east wings, east-facing rooms, east corridors. Had a spirit box session in a decommissioned hospital in Norfolk a couple years back and the activity was almost entirely concentrated on the east side of the building, no obvious reason for it. Nobody's ever given me a satisfying explanation for why that keeps happening.
What kind of off are we talking - temperature, feelings, visual stuff? Would love to hear more detail before I go booking flights to Ohio lol.