Agreed mostly, it (and waveparticle duality) is certainly an inelegant theory. However, I think your selling short its predictive capabilities. All of spectroscopy comes from the wave function interpretation as a probabilty for particle positions. Which energy transitions are allowed, how strong light absoprtion will be, and things like which gases are greenhouse gases and to what extent all comes from this math. The agreement between theory and experiment is excellent. The copenhagen intepretation itself (the assumption of what the wave function is) is inelegant, but the rest of the mathematics past this assumption is actually pretty.
