Tiana should be a more traditional ride and is allegedly much lighter on major room-stealing video projection than nearly anything they've built in multiple decades. At least based on what I was told by a source a year ago right before construction began. To reiterate what I said many many pages ago, this source is furious that they went through with the decision to replace Splash in the first place and wishes it had been canned. They were also very negative about the Tiana ride early on before a finalized budget and plan had been locked in. But at the same time, whatever they heard and saw last year following D23 (and no, it wasn't anything shown publicly, they were and still are keeping a lot of info and details quiet), it was impressive enough to make them do a 180 and think this could be a worthy successor on its own merits. Take that however you will though as it's the opinion of someone else. I will wait and see myself.
Incidentally, I've also heard rumors that some of Universal's future projects will be more physical than their recent content. I don't know if this is true of the current roster of opening attractions for Epic, but there are further plans in development that show some real promise.