It remains to be tested, but I'm pretty confident it will work for this—in a significant proportion of cases. You'd only visualize a few data structures at a time, most likely; there are controls like fast forward/rewind and a progress bar, and stepping one operation at a time; and you can just let it run on the side with the self-navigating camera for an extended period of time, and maybe you catch an anomaly. For applications where you're operating on data structures with millions of elements or whatever, you might need to artificially restrict the amount of data for testing—but that's reasonable to do most of the time. There are also controls you can't see that make hierarchically navigating from groups of data structures to single data structures to single elements, easy.

I think you're one of the few people I've come across who seems to get what it's for at all :D