Battlefield 4 = BF3.5
The trailers EA released for BFBC2 and upwards have never been a real representation of the gameplay in any way shape or form. Anyone who tried the map in the beta should know, nothing but roof campers and vehicle spam as with BF3, but hey, that wouldn't make for cool trailers
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Teamplay is an extremely rare commodity in the Battlefield franchise now, and it couldn't be moving further away from a warlike experience than it is, and therefore should be classified as an arcade-shooter exactly like CoD just bigger maps and better physics.
2142 is the most innovative game to ever come out of DICE.
I however doubt we'll see it relaunched soon, given Titanfall resembles it, and all Respawn Entertainment would need to do is add a similar 2142 Titan gamemode and they're set.
I'm throwing my money at Titanfall and staying far away from the Battlefield franchise (unless max sale somewhere
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).