Some new facts that have been mentioned in interview:
- Variable amount health for different champions confirmed
- One of the champions will have an ability to use an air control attack
- Nailgun confirmed
- According to developers, 5v5 is the best teamsize for Team Modes
- The Closed beta will last for a while so they can really work with the community in refining the game

Not a big issue for me as long as they put in the time to balance them or have tools to edit it (like doom snapmap or just mods)