I don't know about anybody else .. BUT I was expecting 1 key from the weekly reset. ^^ I know that the chest is not on weekly reset but without the keys its pretty much redundant. Farming those keys takes hours to get 1. Its probably quicker to make another character, power level it and rush the HoW story in 1 hour. 1 Key wouldn't kill anybody, would get people the 35 PoE run and would save countless of hours.
Edit: Just received one from doing the weekly bounties but I don't think its a guaranteed one so all down to luck anyway.
Edit 2: just to let you know this post was made before this weeks patch.
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The first Petra bounty you complete and turn in each week will now grant a key as a reward. I believe this is true for all 3 characters. The drop rate from the ether chests and small chests at the end of PoE had also been increased.