As I've written elsewhere, I've been in lobbies (and I agree this is heavily map dependant), where an MK Boots SCing Titan won the match with a negative KD. You may die, but basically you can net a kill every 10-20 seconds. About class specific abilities - I could not agree more with you. That's why the weakest class with the weakest armor and the weakest super had this amazing concept of maneuverability called shadestep - oh well...