Here are some suggested changes for annie:
As an annie main, I sometimes feel that my opponent has no chances against me, so here is some changes to annie make her better to play against, but still keeping her identity.
Base stats: Base attack speed raised from 0.579 to 0.625. Base hp raised from 512 to 552.
Q: Disintegrate Is now a line skillshot with 900 range. Base damage increased from 80/115/150/185/220 to 80/120/160/200/240.
W: Incinerate Now has a 0.25 second delay. Base damage increase from 85/125/165/205/245 to 85/135/185/235/285.
R: Summon tibbers Now has a 0.5 second delay, annie now throws her bear onto the battlefield. Base damage increased from 175/300/425 to 200/320/440.
I hope you consider my ideas.