New LeBlanc's RR behavior is too simplistic
If anyone doesn't know, her new ult allows her to globally cast an illusion that walks towards the nearest champion and casts the spell LB most recently used before ulting. The problem is that she targest the closest champion no matter what and moves in an extremely mechanical way. This severely limits how much you can actually fool the enemy. If there's a Nautilus and an ADC pushing top around mid game, this LB ghost will beeline directly towards Trundle if he's closer and then cast as soon as she's in range. The decision making, positioning, and nuanced behavior just isn't there. It behaves like a bot from co-op vs AI.
This severely limits how much mixup your ult can actually have. The best you can do is start randomly behaving like an illusion to generate a minor amount of confusion.