That remains to be seen. What we do know is the ride path remains the same to go through it, not totally a blank canvas. Staging will have to adhere to the pacing and design of the flume. (See Frozen Forever After staging limitations and shortcuts)
Here is hoping it is designed well to the path, pace and staging.
Fair. It's a blank canvas in terms of theming, but the basic flume infrastructure will remain unchanged. I'll admit, I never thought the pacing of Disneyland's Splash was flawless, so I'm not going to insist upon perfection for Tiana. But to your point, let's hope they avoid the issues we see at Frozen Ever After. Snow White's Enchanted Wish and Adventureland Treehouse give me hope that WDI has learned how to retool existing attractions with competence.