>>714159080 (OP)-Add the ability to control your aerial momentum like in source/quake engine games. On top of that, make the movement speed faster in general. You can sack sprint now. Better yet, keep sprint, but allow hip fire and keep the sliding from infinite. Now sprint is more acceptable to halo fans because it's not like COD sprint.
-Add various forms of progression throughout a match. Ability to upgrade weapons with variants. Like using a weapon you picked up and later being able to go to a part of the map to upgrade/exchange it for a more powerful variant. We already have weapon variants, might as well work with them in a more interesting manner.
-Focus more on sandbox elements. Halo needs destruction on the level of battlefield and the ability to pick up random objects that you can just use as weapons. 343 went in the right direction with picking up fusion coils and batteries. They need to take it a step further.
-Add a map editor. You can keep forge and literally change nothing from infinite's forge. But give fans a map editor for more freedom. Along with this, allow a gametype maker as well where you can script your own gametypes from scratch in C# or whatever code 343 wants to use.
-retcon 4,5, infinite, hw2, spartan assault and spartan strike. Start from scratch with a new halo 4. Keep forerunners mysterious. Introduce a new type of enemy that acts a defense mechanism to forerunner tech. Like sentinels and monitors. Keep the Sangheilli-Human alliance. Make brutes fun to fight. Add new covenant factions and races since the covenant is an imperial force anyways. Create a proper nu-covenant uprising with charismatic leaders like the prophets. We can keep Atriox, just do him right this time.
-Stop with the off-screen deaths and plot points that require you to read a book/comic series to fully understand. Halo's plot is game first, everything else second.