Halo 5 beta vs Halo 5 Aim

I am not here to complain but I would like to know if anyone know what happen exactly to the aim in Halo 5 compare to how it was back in the beta ? I would really like to know what were the change 343 made to the aim. The point of this is to try to understand how it work so I can try my best to make the aim in halo 5 feel more like the beta which I prefer. If you guys have any suggestion about what aim setting I could use as well it would be appreciate.

Thanks