The shape attribute ("poly") is probably an essential one; I wouldn't change its value.
Were you hoping that the hotspot names would be exported as id attributes on each <area> tag? That'd be a reasonable expectation, but it doesn't seem to be set up that way, as far as I can determine. One thing I do notice is that hotspot areas appear listed in the same order in both the exported HTML and the FW Web Layer. This means it shouldn't be too difficult to add id's manually, keeping one eye on Fireworks and just moving down the list.