If you're dead set on a traditional New Orleans design, then I think you've got a pretty good one. I can only make superficial suggestions, since I have no idea how the building is laid out or what happens in back.
It would be nice if the galleries were supported on columns down to street level instead of cantilevered on brackets. For something a little different, you could try a Charleston style with slender white Doric columns and a wooden balustrade instead of wrought iron. One thing to consider: the people living on the top get screwed in the rain - they can't use their balconies. Maybe a canopy?
Also, the little light fixtures above the balcony doors on the top floor aren't historical.
Lastly: what is the material around the doors on the ground level? The warm-colored material feels wrong. A blue-grey granite would be really slick and historically accurate (like the Pontalba).
Or, less expensively, you could do a really smooth dark-gray precast concrete. That would give your street level a modern feel with a historical form. The doors could be swapped out for 4-panel steel casement doors that are similar to the historical doors but much more transparent/industrial/early-modernist.
Concrete like this (but without the holes)
Doors like this: