This. I hope they put in BIg Team Infinity Objective.
I liked Reach's interface more, especially the armor viewer. I also miss Forge World, and Firefight but that's probably because I spent a lot of time using custom rules and either power tripping the bots with 300% damage+invincibility or setting the difficulty to Legendary, 9 lives, no shields, increased damage taken and reduced damage given XD
--- "Dating Yukari Takeba is, like, the closest thing to dating Michelle Ruff, so I don't see the reason why not."- My brother XD
Gametypes and the customisation of them. Assault, Stockpile, Race and Infection were really neat things to do in Reach. 4 doesn't have the former three (Well...I guess Grifball could imitate Assault, but it should've been under an Assault category anyway) and Flood, while having a better atmosphere than Infection, is less customisation than it and therefore removes plenty of fun custom gametypes...
~~~White-Hot Fire-type Specialist!~~~ Pokemon White 2 FC = 4599-7354-7776