This is the patch that Battlefield fans have been waiting for!
Here is a brief overview of the improvements:
Updated commo rose
Squad leaders rejoice! Move and attack commands have been added to the commo rose. Your squad mates will no longer think you an idiot for accidentally giving an attack order that was meant to be an enemy spot.
Commo rose options will change according to the player's whereabouts ingame. For example, a player on foot would have different menu options than someone in a tank or jet.
Improved mini-map

Players will be able to toggle between different levels of mini-map detail with the B key (customizable in controls).
Beep! Beep! Ima jeep!

Press the space bar while in a jeep to lay on the horn.
DICE has decided to give new players a fighting chance in air vehicles. Everyone will start with IR flares from the moment they first enter a jet or chopper.
Chopper pilots will now receive 50 points every time one of their passengers kills an enemy.
Unmanned SOFLAMs will now earn points for the recon player that deployed it.
For a full list of weapon and vehicle tweaks, see
this Battlelog news post.
Rollout will begin at 9AM GMT at which time, Battlelog will be unavailable.