By default, a newly forged item now stays on the hero that has the heirloom (if the heirloom is on the item bar then the forged item goes on the item bar).
Added an option in "Settings -> Gameplay" to "Forged item goes on the item bar" for those that preferred how it was before the update.
Balance changes:
Regeneration Ring: Every attack, the wearer has a 7% -> 8% chance to fill their Mana to full. Cooldown: 5 seconds.
Mana Book (Alec's Passive): Every attack has a 15% -> 20% chance to generate 1/3 of the Hero's Max Mana. Cooldown: 2 seconds.