I have the same issues with Ansible, Switch, the other trilogy modules and the grid. When I switch between Ansible and Earthsea or Meadowphysics the grid get’s unresponsive while the module seems to be running.
It’s a bit cumbersome since I have to save every change I make to prevent loosing it by switch to another module.
I am not sure at the moment if this does only occur by switching or even when I change the cables from switch to the modules (as you have to with three modules and one switch)
Apart form what @GoneCaving mentions above I recall that the primary reason for the Switch (besides the 5V) was to simplify switching between the modular and the computer.