If there's no TAU playable class, I won't buy. I'm sick of the Space Commies getting shoe-horned into a 3rd sequel of a 6 year old game.

Tau need to be in DoW2.

Tau need to be in the WH40K MMO, and not as a pack of mobs to grind through.

I agree. More races than marines would be good. Different types of Human would be good too ie. Sister Of Battle, Guardsman, Inquisitor ect.

The Eldar and Tau would make great playable races, but I'm not sure how some of the "mindless" races like Tyrandis or Necrons could be anything but mobs. There is a Warhammer40k RPG called Dark Heresy, and you can only be humans. It kinda gets tiresome after awhile.

My favorite army is Chaos Space Marines, but i have the feeling that wont happen.

For Tyranids, it would be simple... have it work like a pet class... you play as a Hive Tyrant or Tyranid Prime, or one of the other "Higher" synapse creatures that have a degree of autonomy and intellect, and you can command lesser Tyranids like termagaunts and raveners, etc.

Higher levels would give ya higher "summons" (Who wouldn't want to summon a Trygon or a Mawloc?)