Zoe needs...
A longer CD on E (at least at lower ranks) and/or a smaller trap duration/area. Really, I'm fine with her Q burst as that is part of her design and she would be too weak without it but that E CD is way too short and offers too much zoning due to how long the E trap lasts and its AoE is pretty large. Combine that with the range of E and...well its too much. Other then that? I feel she's pretty well designed.
OH! Also, Mikael's cannot remove the sleep effect, please fix this.