I’m pretty sure the rewards will be nerfed back in 1-2 weeks time, when devs will see that these events are not becoming less popular. And why should they become less popular, when currently they are the most efficient way to get rare/exotic loot? You can spend 1 hour and a half doing lvl38 fractals, or 1 minute in Frozen Maw (actually just 1 hit on the shaman is enough) and you will get the same 2 rares on average.