It's naturally too early to tell and the brief exposition on the general plot doesn't give it away, but my main concern will be:
The climax.
The drop is fun and all, but what adds to it is the tension that the ride gives you before it. The slow climb up, the eerie music, the rabbit about to get eaten, and the clearly evil birds over your head laughing at you.
I hope that with Tiana (as I would with any IP) they make sure to add some "suspense" just before the drop so you can feel the same sort of fear/adrenaline you feel in current Splash.