Never been to Waverly Hills myself, bit far from Pendle, but I've read a fair amount about it and the reports from last spring are genuinely interesting. Multiple people independently reporting the same pressure sensation on the fourth floor without knowing each other beforehand is the kind of thing that's hard to dismiss as suggestion or expectation bias.
What I'd want to know is whether anyone documented environmental baselines before going in. Temperature, EMF, infrasound readings. Because a lot of what people interpret as "feeling something" in old buildings can be explained by infrasound in the 18-19hz range affecting the body in measurable ways, and derelict structures with large empty spaces are prone to generating it.
That doesn't necessarily mean its NOT paranormal, just that you need to rule stuff out properly before the data means anything. Did anyone in your group bring any equipment or was it more of a casual visit? Would be interested to see if the locations where people felt things corresponded spatially across different visits.