Even back in the heyday of malls, mostly they were disappointing as hangouts. It more had to do with the desperation of very little else to do in suburbia. No wonder online activities are so attractive. In a way, AD is an adaption, but also a sort of destination mall for most, not for regular use.
The kind of theme/amusement parks I enjoy most need every kind of customer. Of course they're trying to figure out how to get more open wallets in the park, but they also need the passholders with dining plans that spend very little in-park but pay before opening day every year and know to stay away on big money days. They encourage a sense of being a local institution for some sound business reasons, and succeed partially through being such an inefficient money making machine.
As to Nick Universe, I saw a couple weeks ago rides in maintenance incl. TMNT, and apparently it continues. When was this visit and when is the peak/target season for this park, if not when most others in the region are still closed?