GH2 is not as good as it's going to get. There are a lot of improvements that can be made to the graphics engine, but for right now they're all low priority. The GH1 graphics engine is as good as it's going to get, at least as good as I'm going to take it, because of the feature lock.
I haven't actually tried to attract a graphics programmer to the project so I wouldn't be able to comment on the likelihood of finding one. I wouldn't write off the possibility of me redoing the graphics engine myself, either- GH1 went through 3 other graphics units before settling on the modern ASCII and SDL ones (GraphiX v1, original ASCII, GraphiX v2).
I know you're eager to see the graphics upgraded. Maybe I should start looking for a programmer to work with. Does anyone know a good place to start looking for one? I could post a message to the JEDI-SDL group, I suppose.