Make it present day / future ("concept" weapons, but nothing crazy ... like 2025 combat)
Have it be 64 v 64, at a minimum
Conquest and Rush being the two main modes
Vehicles absolutely everywhere
Destruction absolutely everywhere
Pure, unfiltered chaos for smaller maps
Traditional classes (healer, supplies, recon, explosives / repair ... however you want to label them)
Battlefield is at its best when it's controlled chaos everywhere. When you and your friends are the Ace Squad by getting an enormous score not solely from killing, but for constant participation and objective playing. The moment one task is done ... it's on to the next. Running through a war zone at all times. Explosions everywhere. Tanks threatening you, but then your friendly tanks swoop in to protect. Throwing C4 on a vehicle and sending the motorized bomb into a camper's nest. Playing as a sniper for a little bit and putting your shots on an absurd jump-shot arc to score a headshot. Losing a jet fight, ejecting from the plane, parachuting towards a building, blowing the roof off with an RPG, and finishing off the enemies with an MP7.
GIVE. ME. MORE. OF. THAT.
On a next-gen console.