Your advice on playing defense in huttball is way off.
The key to defense in huttball has nothing to do with killing or attacking the enemy ball carrier. The most important thing by far is to be aware of the location of his TEAMATES, and make sure that NONE of them are in position for a pass, pull, intercede, etc..
The biggest mistake that I see in huttball by far is that people zerg the ball carrier, and then he simply passes, gets pulled, leaps, or intercedes to the goal line.
Think about it like this:
If you were playing football, what do you think would happen if you sent your entire defense on a blitz to the QB, and left everyone else wide open?
Yeah, sometimes you'd get a sac, but a QB who recognizes that you are doing this is simply going to pass immediately and then your team is completely screwed.
Obviously you still have to kill the ball carrier and his escorts at some point, but you should ONLY go full attack mode when you are positive that he has no way of quickly getting to your goal line.
It's funny when the ball carrier drops down into the pit and everyone follows him in like lemmings. That person can just pass up or leap if he's got those skills, leaving everyone behind in the dust.
Too many players lack situational awareness. This might explain why most games end up 6-0. It's actually much rarer to be in a game where it's decided by a goal or final possession, whereas in real sports this is almost always the case. When I watch soccer, I don't expect one team to completely dominate the other in terms of goals (mostly because everyone sticks to their position). All it takes is a few good players to take the match by the reins and everyone else gets left in their wake.