In K-S coordinates it's a liltte difficult to get a good idea of what's going on. A beam of light always travels on 45b0 lines (nice) and the removable singularity of the event horizon is removed (very nice), but massive (sub-light speed) particles are tricky. For example, a particle hovering at the same altitude will follow a hyperbolic path. So when you're far from the center of the diagram even stationary particles move along nearly 45b0 trajectories.It's very difficult to see true velocity, and especially acceleration, from K-S coordinates.Also, it does look like it's a liltte past 45b0 in the lower right. I blame the artist involved.