There is some truth to this, but there's also no reason you can't have both IP and originals in more equal measure. Especially when originals may take some of the crush of crowds/lines from the high demand IPs and result in a more pleasurable experience. Orlando manages to do this successfully.
But this also probably leads to the problem: where exactly do you put those extra original mazes? Orlando does have a lot more space to work with than we do.