Item - Druid T15 Restoration 2P Bonus (New) Swiftmend’s ground effect can now heal up to 4 targets each time it heals.
Item - Druid T15 Restoration 4P Bonus (New) The healing done by your Rejuvenation increases by 6% each time it causes healing.
2 piece seems to be hit or miss. Fantastic (33% boost) on stacking fights, but useless on fights where you won't be stacking. 4 piece is just a nice fat healing boost. Seems good at first glance, but I'll let somebody else do the math.
However, the current 2 piece for 10% off of Rejuvs just seems like it will be too strong to drop. Will we have another T13 situation where Resto Druids sat on Heroic 2 piece T12 until they had full heroic T13? Seems like it will end up that way to me, seeing as Rejuv is generally 25% of our healing.