This card is very good, there was a spell that actually saw play as a board clear, makes running circle and regenerate more bearable when you can use them on more than 1 card also this is a 3/2 minion on 2 if you need it or a 4 mana 3/2 deal 2 as worst case.. sounds good.
It may actually be the most obvious power creep in the HS history so far besides - spell was changed into 3/2 minion with the same rarity, effect and mana cost (well, if we are not counting Dr 7 era)
There're advantages to being a spell, though. Auctioneer, Shadow Visions, Lyra. I think in a combo deck you want Embrace the Shadow but in aggro decks you want this. Or really, just a heal-y package could be realised with this. Regenerate, Binding Heal, Circle of Healing.