The best way to improve your hand eye is to practice it honestly though out your training and try to do stuff that will improve your fast twitch muscles and try to be someone is has good agility and can move quickly not just moving fast. I think being able to focus on a specific thing could help with your hand eye and just working on body control and stuff like that will help your hand eye coordination in my opinion.

I think these are good ways to be better at hand eye but I think it's something that you should practice on a regular basis and focus on it as its something that you definitely can get better at through hard work and determination. And it's something that I think you can see results in n when you put in the time to get better at it.