Sorry if this has been brought up already but I just noticed something with the tidal waves talent.
The tool tip in the talent tree states that not only does it lower the casting time of LHW and HW, but it gives HW a 20% healing buff and LHW at 10% buff. I was testing this out today while I was bored and found out that neither HW or LHW get the added benefit. The buff says that it's only giving you the lowered casting time as well. The in game tool tip on the talent tree as well as talent calcs on websites have it giving you the healing buff though.