As ezreal, Very squishy and can be easily burst down when his E is down. Junglers can camp him at that stage as well since he will have no other form of escape left, and his E has a very long cooldown.

Takes quite some time to scale up due to how his itemization works. This is also dependent on the fact that he is very skill shot heavy and will need to land his Qs on the enemy in order to be effective.

Buffering his E won’t work too well if the enemy has some form of ranged CC which they can use to follow-up on Ezreal after he has used his E. This forces him to play a bit more defensively, and he won’t be able to push in the wave either, else he can get run down by the enemy. As ezreal, The junglers can camp it at this stage as well as it will no longer have any other form of escape, and its E has a very long cooling period. It takes enough time for its itemization to work. It also depends on the fact that it is very skillful to shoot hard and that it will have to place its Qs on the enemy to be effective. Bouffer its E won=t works too well if the enemy has some form of varied CC that it can use to follow on Ezreal after using its E. This obliges it to play a little more defensively, and it cannot push in the wave either, otherwise it can be crushed by the enemy.