The question is whether numpy has such support; if not, is it planned.
No, and no.
Thank you for answering, and I am sorry to hear that.
I will be dropping my membership on the scipy-numpy email list shortly. Many systems handle rectangular arrays quite well already, and are more fully developed.
It is a common fallacy rectangles are the only shapes one ever needs. Physical geometry is only rarely rectangular, and solution of actual physical problems, and even number-theoretical problem, is a far larger problem domain.