as i see it player (friendly and foe) collision would solve lot of problems(zerg trains would not be so compact etc) for this awesome game and make combat even more intersting with formation strategies etc.
could it be possible for devs to turn it on for 1 patch(1 weekend or few hours special event) on PTS with open mass testing event?
make 'dodge roll' and 'jump' ignore collision to avoid deliberate entrapments (indoors/around respawn points etc).