Tier 8

Woh, every tier comes with a setbonus.
10-man set
25-man set

By looking at the stats it seems that we are going to be more critbased (MT heal?) since now every item in the set, except shoulderpads, provides crit rating. From tier 7 only shoulders and hands provided crit.

(2) Set: Reduces the cooldown on Riptide by 1 sec.
(4) Set: Reduces the cast time on Chain Heal by 0.2 sec.

The two piece bonus is fair. You only got two pieces so it shouldn't be imba. I must say, since i cast riptide every cooldown in an intense fight it gives us a 16% increased uptime on Riptide (in theory, if cast every cooldown).

The four piece bonus might seem boring and dull but it actually equals to 262 haste rating or 8% haste (but only on chain heal).
(0.2/2.5)*100 = 8 (8% haste)
8*32.79=262.32 (~262 haste rating)
32.79 is 1% haste at level 80.

Other then that, as it might turn out that we won't need to keep mana spring out next patch, instead, we will probably have Healing Stream / Mana Tide Totem out (Cleansing totem?). Restorative totem are now 3 points instead of 5 and gives 45% increased healing by Healing Stream Totem (3/3). That's also two points spare when it only requires 4 points instead of 6 points to learn Mana Tide. Yeyy!