HTT was OP for Resto, but very weak for DPS shamans (AG was healing for more on a shorter cd and costs no GCD, Conductivity was at least very good for elemental especially for soloing and heroics/CMs.
As an enhancer, i don't "need" HTT. I was fine without it being baseline, but it's very nice for resto shamans who needed that buff. It isn't just only a gameplay change, so far it's a nice buff.