Tree,
A rejected takeoff is certainly not a problem. Carbon brakes work better when they are warm, and who cares if they are a bit too hot afterwards? As long as you don't point a fire extinguisher at them so they explode! Afterwards you just need a little time for them to cool down, but that is at least safe. Brake fans do indeed work well.
The problem had by this aircraft appears to be a fast and long landing where a go around may have been a better idea. However it does appear to have been a safe landing so it difficult to judge without all of the facts. But autobrake should not have been an issue - unless it didn't work properly and the pilots were not able to disengage it by pressing the brakes, something I have experienced some years ago on a 737.