I think huttball is pretty funny, but u are right that u are not the guy who carries the ball over the goal line. I usually take on a more defensive role, setting up cover up high and just pick my targets, stopping ball carriers when crossing fire and so on. Almost always in top 3 when it comes to damage and usually gets 6 "awards" or so...and this with many players at higher lvl in the match.
Someone has to handle the defence, and it can be fun to
Agree though that it is frustraiting when your ambush cancel with 1 mm to go cause they got out of line of sight, well just tab to next target and fire away...