There is as much movement this off season as there ever has been, teams are just not announcing personnel changes or business decisions to the public. There are alliances and working associations taking place, important team members are either quitting or being let go and many new hires all up and down the line. All done in the open but not broadcast to the public.
If you wonder why it is being done this way, just look at some of the assumptions and statements made by the uninformed on many forums.