I officially don't like the assassinations, on record. They are jarring and break pace and sometimes do really glitchy shit.
I also don't like armor lock, it also interupts gameflow.
I hate how in each new Halo game the grenade arc seems to get weaker and weaker. I miss being able to throw a grenade like a man.
The jumps feel a little heavier, but I do love sprint jumping! I also love sprint and camo much more then I anticipated.
The jetpack changes everything in that there are so many crazy ambushes, both a positive and negative experience.
I love the pistol / DMR / Needlerifle combat.
Those of you complaining about this not feeling like halo, I think its cause the AR is weaksauce compared to the other weapons, and the melee change forces shoot-outs. I can totally see how this would fundamentally change how some of you approach combat, and it makes sense that it feels both alien and wrong to you. But I love it.
I had a hard time putting it down, it's super fun.