I'm constantly using Flow to switch between my PCs. However, I need the "Ctrl" key toggle to be enabled. Otherwise, my mouse jumps between the screens when I don't want it to jump. However, the "Ctrl" button on my 2nd laptop is mostly only used for switching back to my main laptop, which make it inconvenient switch my hands back and forth between the 2 "Ctrl" button on the 2 laptops.
Ideally it would be perfect to sync the keyboards of the laptops, but it would also be very helpful to only have the option to hold the "Ctrl" on only one of the laptops (or both) in order to allow the mouse to jump between the monitors. And I hope that will not increase the CPU usage by much, as Logi Options+ gets very heavy on the CPU time to time.