Some tools (pandas.DataFrame(...) for example) are happiest when you give them a raw array of JSON objects.

?_shape=array should do just that

While I'm at it, rename the default ?_shape=lists to instead be called ?shape=arrays

And validate that _shape is a valid option

And have ?_shape=object return the object at the root level rather than nested in .rows to better match the behavior of ?_shape=array