I can only speak for me and my family.
Personally, i/we find ANYTHING is better than waiting in line. Now there are some very very small exceptions to this, like i don't mind a 5/10min walk though line at Peter Pan, or maybe a couple minutes playing with the books at HM. But other than that, I would rather not be spending my vacation time just waiting around. It lets us go shop, go pin trade, go grab an extra snack. Take time out to find all the chamelons outside the tangled bathroom, and not be worrying about time.
As to is it worth it. Again personally I don't value much more than my time and time with my family. I don't get to take alot of time off and i want to enjoy the time i do. So for me, yes its worth it. they would have to raise the cost to something extremely high, to make it worth it for me to spend potentially 25% of an 8 hour day waiting around in line doing nothing.