Not sure if this is already an idea from someone else but I feel like what makes queenbreaker a unique exotic is obviously it's two different scopes and firing mode. I would be more inclined to use it if I could change it's firing mode like Cerberus+1 or mythoclast therefore upping it's usage because of this versatility. Not a big deal tho but thought this was a decent idea.
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Bungie devs said in a recent interview that they would basically need to recode the entire weapon in order to have a function like this. While it is something on their list they said they would rather prioritize making new exotics than basically rewriting an old one. So basically it could happen sometime, but don’t hold your breath.