Neeko is definitely more of the more "meh" champion released recently. Mostly because her shapeshifting and deception aspects aren't really a part of her gameplay identity barring a few situational scenarios, and for most people they probably have the strongest impression on her root and AoE ulti which aren't exactly the newest ideas out there. Thus she doesn't last that long in people's memory.
Though I could forgive Neeko, mostly because it's her designer's first new champ release after being occupied with rework up to this point.