Am I the only one concerned Kalista's changes might break her?

She only needs 1 kill with Rend for a CD and mana refund.

The moment she gets Runaan's in lane, she'll be basically unduelable with how her Rend now stacks spears even while Rend is on CD, and minion wave is incredibly easy resets.

Even without Runaan's, she can just leave one spear in a minion and then aggro the enemy ADC instead, meaning she could spam her Rend every few seconds for constant slow + damage which gets a complete CD and mana refund.