To discuss the quantum gravity of the situation, if the energy emitted through a white hole appears purely as angular momentum, there might not be a gravitational interaction at all. There's no reason to suppose that light itself produces its own gravitational field. This makes sense with Shu's c dominated epoch... G doesn't even matter until after the event horizon. With the black hole G dominated epoch, once you've crossed the event horizon, c is negligible.
Also, I never said the white holes were isotropic. I don't believe the black holes to be isotropic either. Seeing how Shu's cosmology predicts a non-vanishing radius, there is likely a minimum quantum of a space-like dimension L, implying the classical singularity to in fact be a duality. The jets formed around both of these objects would be due to the polarizing effects of these rotating dualities
, having nothing to do with their gravitational properties.