How will Sivir be with the new changes to Essence Reaver?

Looks like she won't be building 40% unless she gets Ionian boots or some AD item that grants the extra 10% cdr. I know that new passive on Essence Reaver is there to makeup for the lost attack speed from the attack speed boots and conditionally the 10% cdr, but it would be really cool to get 40% cdr with the extra 20% cdr from the new passive.
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