I sometimes ponder what the difference between a ride like Pirates and a ride like Frozen is, exactly. Like what specific design elements make one so immersive and one kind of "this is nice, but I'm kind of just floating by a lot of characters - hi characters!".
I think making the design a bit more 360, with vines on the ceiling and such, would definitely be a start towards increased immersion and atmosphere. I also hope the storyline is paced a bit - I think some of the best rides have an emotional arc, a bit of a buildup and payoff, not just a "Let's get in all the IP we can back to back!!" feel. Sometimes the best moments are those with barely anything going on but a few eery sound effects, where you're waiting for the action to begin.