After using the EOS R with the 50mm 1.2 for a few hours, I can say the firmware update will definitely be welcome. Why? Because what throws me off when somebody walks towards the camera from a distance is the AF frame goes about to the size of the person's torso, making it hard to place AF on the face/head area. (Even when using the little circle to specify the face/head as the starting point.) So if the firmware update involves allowing for a smaller AF frame while tracking, then it might reassure me that AF is indeed on the face during the subject's entire approach.
Does this make sense? Another way to say it, when a subject is, say, 15 meters away walking towards the camera, using a small AF frame
without tracking seems easier, because once

+Tracking is turned on, the AF frame stays too big until the subject gets, ummm, about 5 meters away. Maybe the distances sound too far, but they are what I've commonly shot with the 5DIV for several years now.
Now, to be sure, I am seeing some amazing AF performance. And I need to practice a LOT more with this camera. But I do question some of the hit rates I've read online, and now wonder if SOME of them are due to creating less challenging scenario's for the EOS R than the 5D IV when using AF tracking. (Such as having the subject walk more slowly, straighter, and starting a little closer. I don't mean this is done to make the camera seem better, but because it is a new type of FF body, with a new AF experience, and the EVF takes a while to get used to. Mix these factors together and some photographers/reviewers might be unconsciously taking things a little easy with the AF tracking.