You can now 'volley-shoot' the ball. That means, push the ball with the shieldgun a moment before you get it. When you got it, it's too late. It will be shot into the direction that you are facing.
No more double goal.
New Pass system (2nd fire); homing mode turned off, It's now a through ball which predicts the players movement (just like in Fifa). It will totally miss him if he doesn't keep on running at the same speed in the same direction.
You can now run from your own half into the other goal. It was considered as 'long shot' in 1.0.
No more crashes when playing with bots.
When the player (you) has the ball, its now shown in the hud. In the previous versions it was just a yellow dot, no matter if you got the ball or not.
New scoring system:

1 point for a frag
2 for fragging the ballowner
3 for a goal
1 for playing a successfull pass
1 for intercept an enemy pass

5 for owngoal
5 for catching a ball as keeper
Whistle sounds instead of "ball reset" voice.
No more announcer in 'celebrating phase' after goal.
Weaponchange time decreased from 0.3 secs to 0.05s
Shieldgun fire now removes 60 healthpoints
You recover 1healthpoint per second if health is lower than 100 (Customizable)
Ball now has a trail (in teamcolor) when ball is shot. So you can see if a ball is shot or passed.
(Doesn't always work online and the trail is not at the ball often)
Toxeen made us jingles, which are played after scoring.
Dynamic Crowd sounds in DB-Cube (the word 0wnage doesn't do this justice, it simply F0wnz!!)
Shieldgun damage field increased from 50 to 65 (radius)
Bot's goalshots are now deadly, they hardly miss the goal.
Bot's don't shoot from own half if long shots are disabled.
Keeper beacon (arrow on head) now is darker.

Fuente: Planetunreal