They need to bring back, mainly the drop shield, but bringing back the armor lock wouldn't be too bad. It was mainly known for the way it angered people, mainly those in vehicles, and we liked it. Okay, sure, maybe we don't say it out loud, but it added uncertainty to the game and a way for people to defend against splatters. Drop shield, well...... because the regeneration field of Halo 4 was crap, let's face it. You could shoot through it and, dumbest of all, it was easy to kill someone inside it. With the drop shield, at least you had a temporary barrier. As for Vehicles, the falcon was my favourite, and the chopper as well. Great ideas about the promethean vehicles, but what I think they need to do, for weapons and vehicles, is to keep some of the classic guns, and bring back some others, and with the rest, swipe the board and start fresh, because now the weapons are just variations of the same thing, like the light rifle. Sure it looks cool, but it doesn't feel like a revolutionary new gun, just DMR and Battle Rifle put together with fancy new noises.