I think more premium seating, even at the expense of overall seating capacity would be worth it. The days of 20,000 people at Stambaugh are long gone. Doing something to update the stadium, generate lots more revenue, and make the fan experience better would be worth it IMO. Maybe the athletic department/penguin club could put out floaters to see what kind of interest there would be along with a hypothetical cost.
And after attending the MSU-OSU game in East Lansing in the club section, climate-controlled seating would absolutely be worth it. Especially considering how attendance seems to tail off toward the end of the season, even when the games are against marquee opponents.