I wish gun buddies had more visual effects much like celestial gun buddy, the face and color change whenever you fire your weapon. For the higher priced bundles, there should definitely be some sort of VFX. I was bummed out the Ruination gun buddy didn't have VFX, especially since it was a collab with LoL. I'm not sure if they're trying to keep gun buddies from being too intrusive, but some minor VFX would definitely be pleasing to look at.

Edit: Same can be said for animated sprays