Great to hear that it is working again also for you
About Motion blur issue, have you tried to reduce the Shutter speed in the camera tag, it seems pretty high now
In my experience, the most important thing to check for Network rendering, is to not have any c4d shader in the scene, unless it is a Noise or Gradient shader, and only the OSL translation is active in c4doctane Settings/C4D Shaders panel, no auto bake to texture with Net render.
It is also very import to always enable the Render Instance or Multi Instance option for all the c4d objects that have this option, to keep the poly count down, and reduce at minimum the amount of data that needs to be sent per frame.
Always keep the Geometry Control to All Movable Objects in Render Settings/Octane Render /Main tab, and disable the Minimize Net Traffic option in the Kernel panel, unless you have a very slow Network connection.