Battlefield 4: Community Operations was just released for all BF4 players as a free DLC. Contains a map built with the community's help, few weapons, and bunch of balance changes and bug fixes.

Battlefield Hardline: Blackout, a free DLC (though contained in a patch to simplify the installation process) is going out to all players on the 3rd of November, if all goes well. Contains two night mode maps, some new weapons, and bug fixes.

/shameless-plug :p

Man I really want to play Battlefield 4 :P

BF4 is pretty fun, but lost a bit of the charm that the series had back in the day. It's better than 3, but Bad Company 2 was a much better game, IMO. Squad play was much better and weapons didn't seem as overpowered. Maybe I just liked it more because I was better at it, haha.

Still, BF4 is good, and it looks great.