That should work fine. I'm not sure what weird behavior you are experiencing, but it is perfectly acceptable to toggle many key maps at the same time. There is a minor bug with the key map state action, however -- if you have key maps that start with the exact name of a key map (e.g. say you have a key map "Paladins" and "Paladins 2") then disabling the shorter one will also disable the longer one. That's the only weird behavior that comes to mind.

Make sure you don't have multiple key maps enabled with keys set to the same hotkey, that might be confusing too

Finally, you may find it beneficial to instead of using 1 Step with a toggle, to use 2 steps, one with On and one with Off. This will give you some flexibility as far as adding stuff like popup text actions to tell you whether you just turned them on or off, or adding a Repeater State Action to turn on repeater when you turn off your key maps, etc. People find that particularly benefiical for entering passwords when they have key maps set using keys that would otherwise prevent that.