Have you considered retouching some of the visuals of effects in the game? There was recently a post showing an Orisa who was burned, nanoed, and at least one other thing and it was extremely hard to tell the difference at times. In addition to this Mauga's bullets tend to "splash" on the victim's screen and in addition to the burning makes it very difficult to see at times.
As we inevitably add more heroes to the game, with their own set of abilities and visual kits, we'll continue to look at past vfx and new vfx to make sure they all play nicely together.
We always strive for clarity but the Orisa post was a great example of how it can be difficult to read some of those stacking effects. Team is currently talking about solutions for that and hears the feedback on the readability for some of Mauga's abilities.