it would be nice if the first hero point would let us choose if we want tempest to replace lightning bolt or chain lightning.
right now getting a tempest proc actually feels bad when you have set up your storm bringer and the changes in the next patch are actually going to make it much worse as tempest will give you movement speed and two instant lightning bolts but the instant cast buff does not stack so if you get two tempest casts in a row you cannot use up the stacks and the movement buff cannot be timed thus making it mostly useless