One fact that makes me prefer the scarab to the scar is the silencer, not only as it looks cool...(It`s also map-depending)
In General the Instant-Action for me is ridiculous, as there are like NO tactical possibilities except when u play with friends.
So its pure reaction, and when that "Dead by Spawn" happens 3 or 4 times i quit this ****.
Pity that u cannot select when and where to spawn, could be a great thing for the next patch. (I heard in Crysis1 u can, never played online)
But i do like the other games, assault is great.