I predict that control shaman will be very powerful post rotation and it will be the premiere control deck. I think this deck could do wonders in Un’Goro but I think it needs more healing then just Hallazeal the Ascended and Jinyu Waterspeaker. Un’Goro needs to print another powerful healing card for Shaman like Healing Wave in order for this deck to be viable.
Even with Elemental Destruction rotating out, I think Hallazeal the Ascended is still a powerful card. Granted, he won’t heal you back to full but he will heal you for a substantial amount with Lightning Storm or a spell boosted Maelstrom Portal. He also has great synergy with Ysera Awakens.