LOL this reminds me of Microsoft update: 1st they release an update that is supposed to fix something but actually brakes 2nd they release an update to update to fix the code that's broken 3rd they fix everything with the Service Pack.
Seriously, if everything is working, why upgrade the firmware?
Because they get complaints for certain attributes of the camera that they can actually do something about, so why not?
For example, I remember when this camera came out a number of people complained about the Auto ISO going too high, especially when shooting in good light outdoors. It would seem this firmware addresses that issue.
Even with the 5DII enough people asked for a firmware update to "fix" the video and Canon obliged. I didn't think that they had to do that as people bought the camera as it was.
Hiccups are part of technology, no company is going to get every piece of software 100% right every time.