I believe handling the large 2x ball can be more advantageous than simply hanging, but the score is dependant on your shooters. You can get alot of balls in your mobile goal if you push it up to the driver station, and have a tall human player to "lift" the balls over the station and into the goal. After that you can cap the goal off with a 2x ball to get a substantial score.
And you can use your 2x ball handling arm to disrupt the people who try to hang.
As I see it, if the arm is underneath them, providing some measure of support, then their points wouldn't count.