Weren't they like that though at the beginning when it changed over to Dragon Challenge? And then some idiots started throwing things and someone got hurt? So Universal had to change it? So even if Dueling Dragons still existed as is, they would no longer be actually dueling... It's amazing how just a few people can ruin the enjoyment of so many.
EDIT:Ahh... just looked it up... they suspect it was just loose objects flying, not people actually throwing things. But still people being idiots by not securing loose items. Either way, would have lost the dueling part no matter what the ride was named.