here are the important bits:
SANDVICH
-sandvich can now be dropped with the alternate fire button.
-dropping the sanvich removes it from the heavy.
-sandvich can be regained by collecting a health kit while already at full health
-eating a sandvich dropped by a benevolent heavy will heal 50% of your health.
-the main thing about this is so the heavy can heal his medic!
MEDIGUN/KRTIZCRIEG
-Old healing scaled from 1/sec to 3/sec based on time since being damaged (maxed out at 10 seconds). New healing scales from 3/sec to 6/sec.
-i'm not sure what this means, but it appears to say that it will take a longer time to heal people now.
BLUTSAUGER
-the blutsauger now deals critical hits!
-however you now los 2 health for every one second you have it out.
there is also now a new ADVANCED TOURNAMENT HUD which allows you to see the class choices of all your teammates at the top of your screen. you can turn this on in options> multiplayer> advanced.