That's not really true. The height requirement is staying the same no matter what. It's not like "downplaying" the drop would get anybody on the ride who couldn't have gone on it before. The drop is also self-advertising, so even if you got smaller children hyped for the ride by excluding the drop from promo materials they'd still see it on their way to line up and either be scared of it or not.Now that's an interesting point. Splash's entire marketing campaign was that it was a thrill ride with a huge drop.
With this- they have to downplay the drop as much as possible, as Tiana is a property that appeals primarily to elementary school girls, a completely different demographic than those attracted to a giant, scary drop.
Not that Disney targets much of their parks promo to young children anyway. They're not the ones buying the park passes.