Remove upper deck, replace with nice press box + suites (indoor/outdoor seating). Focus on the terrace that surrounds Cajun Field. Maybe make the entirety of the terrace covered (in an aesthetically pleasing way). It'd be a place that people could mingle, watch the game, buy drinks. The terrace is where they can get that "tailgate" within the game concept they floated around in the fan survey.
Turning the entire terrace into a bar/tailgate area wouldn't satisfy the "premium" options ($$$$) the AD office is seeking, but maybe amenities such as drink delivery or sealed-off "clubs" with further amenities like TVs, waitress service, etc. could be provided.
I dunno, this has all been discussed ad nauseum, but it's a topic I enjoy.