No, batch editing in the CIE is possible, so long as you are on Windows. However, you would have to save the images one-by-one from C4D at the moment. This means it would be impractical to, say, use the CIE to edit an animation afterward, not because the batch editing isn't possible, but because saving the files out in CXR format would mean rendering and saving one frame at a time. However, if you created 4 or 8 still images and wanted to batch edit them, then on Windows you could indeed batch edit them just fine, as the batch editing aspect does work :)