While we aren't getting the capacity boost that DAK needs from a numbers perspective, the impact is greater than you think. Indiana Jones will have far greater marketing appeal and draw far more guests. The updated facade and land's layout will also make it far more obvious than it currently is. Dinosaur is very well hidden at the moment and a tall pyramid looming in the distance will make it stand out far more.
It's certainly not enough additional capacity, but it is going to have a major impact.