I would love to see more sound based MTX.
We have skill MTX that change the appearance of skills and effects, but I would love to have sound MTX that change the audio of events in game.
For example, if you created a sound that made all kills play a sound similar to the Profane Bloom pop sound, I would buy that in a heart beat. Or a simple tick sound, often used to show you got a kill or a hit in FPS.
There is so much potential for both lore and world accurate sounds, AND more haha funny reference sounds. You just have to make a decision as to how pure you want to keep the experience.
Garry’s mod vibes are not always appreciated, but those who DO like a little whimsy will love it.