First Bug :

Anywhere you go on the map in a meadow, i should be getting the value "meadow". However the only value im getting is "0".

Anywhere in a meadow, you getting the value 0 for the "meadow" sound controllers, but the "meadows" sound controller working fine and not returning 0.

We can't use "meadows" sound controller in environment sounds config because it's only available for weapons.

That's a really major issue, because we can't create a good meadows sounds for a map.

Second Bug :

getAllEnvSoundControllers returning "meadows" sound controller, but this sound controller can't be used in environment sounds config.

getAllEnvSoundControllers need to return "meadow" sound controller.

First Suggestion :

Create a command like this but for environment sounds.
The command pointing to volume of a soundshader for environment.