A very minor bug for rotview: the graphical output of does not accept negative rotations, although the command line invocation can accept, calculate and plot them just fine.
It is the sliders in the plotted figure that cannot handle negative values.
I would say that +/- 360 degrees would come in handy. Certainly, that would cover each rotation dimension twice over, but sometimes fits of frames end up at negative rotations and it would be nice to be able to visualize them manually.