I have to say that I really look forward to these updates to the overlay.
I am most excited about the record time addition, but I can see uses for the others as well. I may not have need for file size information, but I could see it being used if one is running low on space on their recording drive, or even with the larger file sizes from 2k/4k videos. I must admit that I had never thought about displaying bottlenecks in the overlay, but I can see it as being really nice for finding the source of recording issues.