I'm looking forward to a park full of rides that I haven't ridden a hundred times already.
Flat rides give kids more riding options that don't involve the long wait. They are low in cost so they can add to the ride count without taking away from the big rides.. More rides means shorter lines.
One of the things that always stands out in my mind about IOA is the themed music of the lands. Hopefully the new park will have the same quality of music.