How we (Riot) feel about Annie.
Here's some stuff we're happy with about Malzahar Annie and are unlikely to change:
Functions well as a reliable anti-mobility/anti-assassin via ~~Nether Grasp (R)~~Pyromania (Passive) and E.
Has really fun/unique farming patterns via Malefic Visions (E) Disintegrate (Q).
Here's some stuff we're less happy with and are actively trying to resolve:
A simple W>EQ>R is often enough to eliminate or remove enemies, leaving them little opportunity to act outside of not getting into his her range.
MalzaharAnnie is inherently low agency, and is historically balanced in a way that means he she forces similarly low agency situations upon opponents.
Voidlings Tibbers are is a cool and unique element of the kit that often don't play a large role in his success throughout the game (AD Malz aside).
FTFY