Change to Kalista allowing her to re-target autos hurts her chasing ability.
The change to her auto-attack is great for last-hitting, but it now makes it impossible to initiate a jump if you click on top of an enemy, because instead of a jump, the game treats it as a re-target, even if the target is the current target.
Previously, double right-clicking on an enemy in attack range made you attack them, and then jump towards them.
Now, double right-clicking an enemy in attack range just makes you attack them, with no jump initiated.
I would propose that you can't re-target on the current target, and it should be treated as a leap.