Best Features Hall of Fame | BFHF

BF3: Cross-squad Lead VOIP was very cool and innovative tech for an Xbox FPSRPG.

BF1: Naval Combat incroyable. Blimp warfare and titan enemy vehicles on a breakthrough push were for some gargantuan theatrical epic battlefield moments. Awesome equipment. In literal awe.

2042: Commrose communication, vehicle delivery, ranger(!!), T-system field customization is very cool. 

2142: mechs‽ 

Battlefield 3 was my first introduction to the series and I've had immense fun in each title since. I haven't missed an entry but for Hardline and not for any objection to the title, I just wasn't in a place to sink any hours into it for approximately it's entire lifespan. 

What were your favorite entries and features?