Static graphics like surfaces and environments look really good in infinite. Having said that animations, and particle effects look really bad. If you compare explosions from previous Halo’s or animations of even grass/leaves blowing in the wind, Infinite doesn’t compare.
Just look up destroying vehicles and compare them. The worst is when you destroy a phantom in campaign, it just disappears in a ball of light. Where before it had huge pieces of debris.
I know there are likely to be gameplay improvements over the life of Infinite, but I really hope the visuals improve as well.