Hi-Rez Studios announced the Global Agenda v1.3 patch, named Sandstorm, to be released by the end of April 2010. There's a lot of enhancements, new weapons and such, without radically altering the gameplay. Read all the details:

Character levels and specializations:
Leveling from 30-50 will now have a lot more meaning.
At level 30+ players will be able to choose a specialization path for the character. Each class has two specializations (that match the current Skill Trees)
You can only choose one specialization which allows you additional skill points in the specialization tree and allows you to use new weapons/devices that are being introduced.
If you want to specialize in both areas and change between them frequently you will need to create and level up another character for that class.

New weapons/Device:
For each class specialization new weapons and devices are being introduced. We are trying for at least one weapon/device per slot type per class
Some examples: The Laser Sniper Rifle, The Barrage Grenade Launcher, The Claw,The Perfect Rifle, The Beacon Tracker, The Impact Hammer, The Multi-Heal Gun, The Oathbreaker Boost. There are over 50 that we are currently evaluating for introduction.
These weapons/devices will be earned in a special way using Conquest Tokens
These weapons have a minimum player level requirement ranging from 30-50

Store openings:
More stores will be open.
The Jetpack store will have two new jetpacks available that are purchased using Conquest Tokens

A new hightech UI is being introduced although not all screens may be changed to it in time for the 1.3 release.

Conquest and Mercenary Tokens:
Conquest Tokens are earned by playing/winning different parts of the game with a maximum tokens that can be earned each day. (Subscribers will get them faster since they will be able to participate in more parts of the game, but everyone can earn enough over time to get the various rewards)
Mercenary Tokens are earned by playing/winning various matches with a maximum tokens that can be earned each day. (All players earn these at the same rate)

Rewards, Loot and Crafting:
We plan on having full Armor drops as loot in PvE missions which are character bound when you get them (both Co-Op and Open Zones)
We also plan on allowing Armor crafters create upgrade kits to these Armor drops to improve their stats.
Weapon upgrades will be replaced with Upgrade Kits that allow players to improve the stat on the actual weapons (instead of overall stats)
Weapons will also drop as loot in PvE with improved stats over current weapons (which can be then upgraded with Weapon Upgrade kits from crafters)
Weapons and Armor can also be purchased with Conquest Tokens and Mercenary Tokens.

Open Zone (Warzones):
We are currently testing these zone which are large open spaces that players will join to do various missions. For the 1.3 release we plan on having open PvE zone with several different mission types as well as a PvPvE zone with several mission types and a zone win condition.
We are currently rewriting some of the Unreal 3 server to allow more players to interact in the zone. We don't know what the final number will look like yet but we hope for a minimum of 30 players in a PvE zone and 50 in a PvP zone.