I don't believe point #1 - I have been involved in shared governance bodies as a student and staff, and at least where I've spent time, these bodies are strong.
For point #2, I never saw any shift of authority to administrators. In fact, I left academia because I was given a mission to centralize computing resources to ensure we're responsible stewards of the data we held. Instead, PIs would end-run around shared computing facilities, spending their own grant money on high end workstations, USB drives. I left and went into big tech because I was tired of fighting with essentially 50-100 small fiefdoms. The administrators were powerless, and if they tried to force the PIs to submit, they PIs would simply go someplace else.
For #3, while "impact factor" took on a larger role, I did not see a problematic shift in how we did science. Everyone was given adequate resources to participate in governance. If anything, the outsized influence individual PIs had over how they did their research made it more difficult to ensure data was stored safely, analyses were reproducible, and so on. That, to me, is a greater risk than the fear that administration was telling researchers what to research.
There are problems with higher ed in the US, but I don't understand how to equate a perceived shift away from "shared governance" with deep fundamental issues in the mission of our higher ed system. We need both a focus on educating young people (need to have fresh minds and bodies to keep the research machine churning) as well as basic AND cutting edge research to keep progress moving forward.