Opportunities to trade directly with vendors and players
Players that stall behind on adding cards to their Inkwell won't be able to do much when their opponent starts playing cards that cost eight or nine Ink and have powerful stats and abilities
If anything, we will probably start running into an even wider variety of decks
With amber cards such as Dalmation Puppy, Tail Wagger costing two ink, that opens up the potential for Perdita to flood the board with low-cost cards that can keep your opponent in check by challenging their cards - or simply questing to accelerate your own lore count to victory
The upside of being able to sac itself and have it act like a Deduce is significant
When you consider that rares and mythics are far more valuable than commons and uncommons are, which are pretty easy for everyone to access, in practice, this means that for every pack of The Brothers War you buy (assuming you eventually buy 10 to get the Golden Pack), you are essentially getting 1.6 packs worth of value, making Golden Packs perhaps the most generous improvement to the Arena economy ever