Alt+F4=secret weapon in Halo PC!
Please Bungie, for the love of god, create a good networking structure. Halo 2s wasn't perfect, but at least your shots registered. Halo 3s would work perfectly in a lab environment, but it works for -blam!- in a realistic environment where packets are lost and there is actually latency.
My other want is to just please, please, please, please fix the BR. Increase the bullet speed so that the BR actually works at medium to long range. Derandomize the spread, decrease the spread size, and just basically return the BR to the Halo 2 BR.