Ok first up, armor abilities. I disagree, I did think they were unblanced in reach, but in halo 4 I think a fair job was done to make sure they didnt play a huge effect in battle. They should stay how they are.
Second is loadouts. I agree, I like the larger sandbox of weapons you start with. Using the same weapon constantly gets tedious. However, as you said, the weapons are not very well balanced at the moment.
Third, everone loves sprint. Well, mostly everyone.
Fourth is ordnance drops. I agree up until you said take out power weapons and powerups. That would make them pointless. There are grenade spawns all around the map and you already get 2 everytime you spawn. And you get plenty of ammo off of dead bodies.