A recent bug was reported where Vision of Unending Growth
was only giving around 2% proc chance instead of the 2.5% proc chance and should be corrected soon. In addition, we received confirmation that the proc chance for partial ticks is prorated to smooth out the increased healing provided by reaching the 20% haste breakpoint.
What this means is instead of receiving a full Rejuvenation
proc chance regardless of the size of the partial tick, the partial tick's chance to proc an additional Rejuvenation
will be proportional to the size of the partial tick. For example, if the partial tick is only 50% of the healing of a full tick of Rejuvenation
then it will have a 1.25% chance to proc an additional Rejuvenation
instead of a full 2.5% chance. This essentially removes the significant healing increased by hitting Rejuvenation
haste breakpoints. Haste will still be valuable for this legendary but there won't be sizable healing step increases based on Rejuvenation