Bloodlust, Heroism, Time Warp and Ancient Hysteria can no longer be cast while in Arenas.

The Battle for Gilneas
The time it takes to capture a flag has been reduced to 5 seconds, down from 8.

Strand of the Ancients
The damage done by Antipersonnel Cannons has been doubled.
The missile speed of Rocket Blast (Antipersonnel Cannons) has been increased by roughly 50%.
Some Antipersonnel Cannons could shoot the platform they were spawned on. These spawn locations have been fixed.
The Battleground Demolisher no longer has two additional seats and now only has room for the driver.
A PvP duration flag has been added to Battleground Demolishers. This should make it so crowd control effects cast on unmanned demolishers does not last an extended amount of time.
There should no longer be a discrepancy in time when the Battleground Demolishers spawn at the start of each round.
The Battleground Demolishers spawned on the docks no longer despawn when the north graveyard is taken by the offense.
Massive Seaforium Charges should now be useable in rated Battleground matches.
The duration of the Teleport debuff has been lowered to 10 seconds, down from 20.
The radius of the Seaforium Blast has been lowered to 10 yards, down from 20.

Cooldowns should now properly reset upon entering a rated Battleground.
Players should no longer lose their Horde/Alliance buffs if caught by a druid’s Cyclone while participating in War Games.
Tol Barad
The number of guard spawns has been increased
for both Horde and Alliance base camps, with guards now surrounding the edges of each camp. Both Alliance and Horde guards use all abilities that the Furious Hyjal Warden uses and will attack with ranged abilities when unable to find a path, or at a distance. Guards are also immune to taunt effects. In addition, Hellscream and Baradin Guards now respawn more quickly.
The northern graveyards on Tol Barad Peninsula for each faction have been moved further apart from one another to lessen the fantastic camping.

Tol Barad

Tol Barad

Tol Barad
Spiny Tidecrawlers and Darkwood Hatchlings now appear as non-aggressive (yellow).
Imprisoned Workers now have a smaller aggro radius. They also drop Cellblock Rations for players that are on the quest “Food From Below”.
The Baradin Crocolisk can be skinned without issue and the Crocolisk Hide, used in the quest “Swamp Bait”, is no longer multi-drop.
“The Leftovers”, “Swamp Bait”, and “A Huge Problem” quests are now sharable on the Alliance, and both the Alliance and Horde versions give high reputation and gold.
Tank and Problim now have full immunities to all crowd control effects.