In this case, there are lots of cards that may be hit. Innervate, UI, Swarming Plague, etc.Because that's what all the "feedback" has been about? Blizzard nerfs murder cards. That's what they do.
Innervate going from "add 2 mana" to "replenish 2 crystals" would be a reasonable change that reduces how obnoxious the card is while still leaving it playable and actually makes it more on-point lore/flavor wise.
Similarly, UI going to "draw until you have 5" would be a cute way to nerf the card without dumpstering it.