Played it at Eurogamer, didnt really have enough time on it to be honest but thats expo's for you.
Melee combat was a bit iffy, I doubt alot of people will go for the all out anyway. The rat power was fun placing it underneath people to attack them. teleport was basically just pointing a little icon where you want in first person and bam you move there.
I didnt like the people controlling power since you suddenly appear literally behind the person you just took over briefly, i didnt expect that and it got me seen. I would of thought the point was to hide and use someone to open a door etc for you.
Seemed interesting but I didnt have much time on it