I guess the replay still has a stutter issue It is the same issue the "old" (not the pre 2020 UI) had. Any panel causes massive framedrops when used with many drivers in the camera screen.
Yes, it's still there. Its particularly noticeable as the video shows for the scrolling position bar at the top. It will also do it when displaying the bottom video bar, but not as badly. The replay screens are now locked at a maximum 60fps, as we had seen in the recent Release Candidate. But the top bar reduces it to under 30fps in some cases where the lower one will spike to 55-60 drops sometimes. In better news, the inputs display (throttle, brake, clutch) seems much nicer (larger, better resolution) and with better refresh rate, but there is still some lag in this.