Jax needs something.
I've been a Jax main since preseason 1. Jax has had a lot of ups and downs, but everyone remembers the times where he's been very OP. I understand that. Jax's kit is pretty hard to balance because of how he scales with items and that he is a hybrid champion. However, I think he's REALLY close to being balanced.
I'm not saying that Jax needs a lot. Obviously there are champions that are in much bigger need of changes than he does.
Jax is outdated. Many of the other bruisers/juggernauts/fighters have something that Jax doesn't have. The biggest problem I see with him is where the damage on his auto attacks and abilities land. On all of his auto attacks and abilities, the damage happens at the END of the animation. Most melee carries it happens at the beginning. Jax has a really clunky auto attack animation, and it's really easy to cancel an auto attack or have an auto attack be cancelled by the enemy that you're attacking simply moving. It's very frustrating to be dueling a champion just do die because their damage happens first. It happens with Leap Strike too and it's very annoying. Leap Strike's damage should happen when he lands, not when the entire animation finishes. His auto attack damage should happen at the beginning or the middle of his animation, not near the end.