Keep in mind that the middle end zone seats' entrance/exit tunnel is at the very bottom so you'll have steps to climb to get to your seat no matter what. The rows are numbered 1 thru 21 so choose your seats accordingly.
If you're sitting in the end zone 200s, it's not an entirely separate level from the first level, they just sit a little higher up and a little further back.

Among the 31 NFL stadiums, I would assume Bank of america Stadium is in the bottom half overall. There is at least some history here but the fans need to really step their game up for this place to get some press.