I'm experiencing the Tournament of Ages for the second time this year, and I have to say that I really appreciate Blizzard putting the effort in to fix this sharding issue. I was at the opening ceremony for the event, and my guild, including well over a dozen others, could not see the firework show that they put on, due to the sharding.
Fixes such as these are not only an enormous help to those who attend the Tournament of Ages, though to all other RPers throughout the game, as well.
Huge respect to Blizzard for taking the time out to show the RP community some love and care, it means a great deal to us.