That trend of blurred lines has been going on for quite a while. Iirc a big callout of the 9/11 commission report was lack of communication between the FBI and the CIA. Even on the local side increasingly it seems every major crime gets a mixture of various federal, state and local law enforcement response.

A notable case was the Uvalde school massacre, which only ended when a border patrol tactical team (believe from the BORTAC group you mentioned) took over from dithering local forces. This was a major example, but interagency collaboration has also become routine in far less dire circumstances.

The militarization and blurred lines have thus become a feature not a bug. And it won't be reformed simply by having the current administration fade into the rearview mirror. It would be beneficial I think though if current excesses led to a more holistic introspection and reform, but we'll see.