Why the Leblanc rework sucked
I remember Riot mentioning in their details of the Leblanc rework that they wanted her to be more "deceptive".
Name one time (post rework) you committed for a Leblanc clone and thought, "Damn, that guy just fooled me".
Probably enough times to count on one hand (if any times at all).
Now, compare that to pre-rework Leblanc where the clone ONLY spawned on your passive. That low hp passive worked on bad and good players alike, and it was fun to play as and sometimes funny to play against.
Current Leblanc's Ult > Ult clone horseshit rarely ever works unless you disabled your mini-map/brain or something.