Let me give an example: right now I have constant combinators in my factory that disable the production line when turned on. They contain signal-red=1. If I were to replace those with switches, it would visually show "ON" when the production is offline and show "OFF" when the production is online. I could of course use a decider combinator configured as "signal-check <= 0 then 1 as signal-red", but I think there is an opportunity for neater solutions.

A simple way to implement would be to add a configuration button inside the switch that inverts the visual when checked (i.e., shows OFF when on and shows ON when off).

You can probably also put red=-1 into switch and hook up red=1 combinator anywhere in the circuit network.
Then, when switch it ON, it'd add its -1 into the network, resulting in red=1-1=0 there, which should get the desired result too.