Golden packs containing cards that are not standard-legal
According to https://magic.wizards.com/en/mtgarena/drop-rates, golden packs will include:
"At least one card per pack will be Mythic from any standard-legal set, 2 cards will be Rare or Mythic from the latest set, and the final 3 cards will be Rare or Mythic from any current standard-legal set."
This means 4 cards will come from any standard-legal set, and 2 will be guaranteed to come from WOE. Because LTR is neither standard-legal nor the most recent set, these cards should not appear in golden packs.
As a standard-only player, this hugely devalues golden packs and is honestly incredibly disappointed. I went from being excited to spend all my gold on packs for the new set today to not even wanting to bother at all.

-
TheXiled#77814 commented
I also received some LTR cards in my golden packs, 3 cards, specifically Galmdring and 2 copies of Doors of Durin. Since I rarely play alchemy and historic, if at all, I would like them exchanged for cards in standard as per the drop-rates page that is linked in the store.