I found it odd that they'd release the RII so close to the first one - it seems out of character for Canon, but I guess anything can happen right now since they're moving into new territory with the RF mount.
Maybe a lot of the feedback on the R was put into the high resolution body design (i.e. updated touch bar, 2 card slots etc), and maybe Canon was concerned that the reception to the high-resolution body (if released alone) would be tempered because it isn't the "do it all" body that people seem to be clamouring for. I really expect that high resolution body to be a specialist tool - low fps, maybe even poor low-light performance, but very high res, probably ruggedized and very very good image quality. The RII could be a do it all and a proper 5D replacement, with the updates to the R that people seem to be after.
Releasing both at the same time may allow Canon to change the dialogue in the internet media while still maintaining the "each body built for a task" business model rather than the good, better, best segmentation model used by other manufacturers. Otherwise people seem focused on complaining about the lack of a feature in a camera designed for something else. Time will tell I guess!