Brewfest is currently live in Oceania and the U.S. and so far there have been some issues:
Brewfest didn't start on time.
The setup crew appeared when patch 2.2.2 went live, but the event didn't go live until midnight. Unfortunately for some servers, it didn't go live then as well. It seems that if your realm time is different from the timezone where the server resides, your Brewfest will go live according to the server location time and not the realm time. For example, U.S. East Coast servers that are located on the West Coast had their Brewfests begin at 3am.
The ticket rewards were too high.
It appears that quite a few of the hotfixes originally intended to go out with 2.2.2 were not applied properly as the patch went out with the maintenance today. Many of these hotfixes are now being pushed out.
You should now get 2 tickets for each keg you return for the keg delivery quest.
"Bark for the Barleybrews!" quest reward should be 15 tickets.
"There and Back Again" quest reward should be 10 tickets.
"Pink Elekks on Parade" quest reward should be 40 tickets.
You should be limited to 25 "keg protector" buffs.