The Indirect Annie nerf were impactful

"Pet attacks more accurately draw turret aggro"

You want Annie players to utilize Tibbers more and then you give this indirect nerf to her.

Before she could do this:

https://clips.twitch.tv/RelentlessSpoopyKeyboardBIRB

This kind of mechanic adds skill expression to Annie's kit and it was removed due to an indirect nerf. Good Annie players tend to use Tibbers as their means to tower dive and not just fully relying on Flash+Tibbers combo. This is actually a good utilization of Tibbers and kind of invalidates his role of Annie's protector (Lore wise). And now she gets aggroed even when Annie doesn't proc her Molten Shield, doesn't have Liandry's/Ludens when in tower aggro. She already has clear weaknesses and strengths, and she just became worse. Annie has had been lackluster for patches now and she doesn't deserve this indirect nerf.