Yeah I more or less figured out the changes to delineate the 50% line, but I wasn't sure about the blue fire on top. If you look at the intensity of the flame at 2:25 vs. 2:30, you can see a difference even though they both look like full burst bars.
I know they made comments about changing/enhancing regular bursts so I was wondering if it had to do with that but I'm not sure.