well after watching a few trailers i've noticed alot of changes such as...

• flamethrow (INCINERATE )
• burst fire pistol
• a wide variety of executions
• stoping power (if you get hit you move slower)
• meat shield
• you can stick gernades to the walls to make prox mines
• New maps (of course) but gridlock is still in there
• weapon locations change every round (one time it will be a sniper, another could be a lancer etc.)
• new characters
• new game modes (capture the flag, Guardian *assassination 2.0*)
• chainsaw battles
• less shoutgun F4ggots