The Matrix online is about to be updated and a very detailed change log has been released titled  Combat Revision 2.0 in an Oyster Shell giving us an idea of what to expect from the update.

Melee Free-Attacks
The old multi-on-one Interlock system has been replaced with the addition of Melee Free-Attacks. Players can now choose either ranged weapons or a melee-combat Style to attack with from outside of Interlock.

Because of the addition of Melee Free-Attacks and tactics being available from the hotbar, the WASD keys no longer map to tactics during Interlock. (You wouldn't be able to move and use Melee Free-Attacks if tactics mapped to the WASD keys.) By default, new characters get tactics mapped to 1 through 5 on the first hotbar. You can move tactic hotkeys to whatever slots work best for you.

 

The full document can be found HERE