Why not replace it with Julia, which should be a bit further when it comes to libraries, and can run Python? I admit, Julia is also still unstable, but it makes fast progress and should reach a stable state in 2017.
I hear the normal PyPlot/GR wrappers are pretty useful as well. They're ultimately not native Julia code, but since Julia makes it so easy to reuse tools in other languages, why not take advantage of that feature?