New/confirmed are more about before/after triage than focussing on reproducible or not.
Reproducible or not isn't really a particularly useful thing to know from a dev side. I regularly fix things I can't immediately reproduce. If we want that information a flag solves it better. What's important is making it so that if some other dev/triager has already processed a bug and come to a decision about it, that I don't waste my triage time reading it and making sure that if I open a confirmed bug it has all the info I need to start investigating it.
