This might come as an odd request that seems minimal, but I feel adding this option into Custom games will make a massive difference in the fun factor of future Halo: Infinite custom games. If you think back to Halo 3 and Reach, you had games such as Jump Rope and Speed. Players took advantage of the physics engine where an object in freefall kept gaining momentum the longer it fell. This could be amplified by looping players through teleporters. Now in real life, objects have a terminal velocity and this as been corrected in recent Halo games but the unfortunate side effect is that games that took advantage of the somewhat wonky physics were broken. No longer can you have light speed warthogs to swing hammers at or dangerously unpredictable objects spinning about.
So in the upcoming Halo game, a toggle to turn off capped object and player acceleration would be a simple but great addition to customs that could reopen a big door to alot of fun.