What i think is impact could be very well be introduced as a high ceiling skill, where player ability to use the proc instead of wasting set themselves apart as better player. One of the way of doing this has to be by nerfing veraero/verthunder or even the verfire/verstone and add a more signficant buff attached to impact maybe next 10sec damage % increased or +50% to next spell potency. This will not be a popular move as im sure even my suggestion here will get bombarded by objections but this is the only way i see to make us want to cast impact while maintaing current DPS potential.