Different sounds/animations for getting duplicates in the new MTX system

I don't know if this is already implemented as the new mtx system isn't released yet, but I was thinking about the new animation/sound for opening mystery boxes and how there should be a different sound/animation (not as exciting) for getting a duplicate of a mtx you already have. I think this would improve the experience of getting a good item much more and potentially lead to more box sales. Take the sound of uniques dropping for example. When I first played, I would always be listening out for it and get really excited when it did happen. However after a while of getting 'trash' uniques, the novelty of the sound began to wear off and it usually just resulted in a mild eyebrow raise when I actually did get something interesting. This reduced novelty affect will probably happen for opening mystery boxes as well if there is the same notification for getting a 'bad' reward (i.e. duplicate) rather than a 'good' one, leading to a lesser 'reward' feeling which is what the demand for the mystery box thrives on. I know this is only a small concern and doesn't really affect players directly, but it might lead to increased popularity of the mystery box and hence greater sales revenue for GGG.