Same! The basement layout actually does makes sense.. It reminds me a lot of 2014 laout.. ^_^ But, that year the 300 levels extended a bit further onto the East side of the BCC.. and they also had the upstairs ballroom too as a Mane Hall and the concert stage in the basement, exclusively..
To echo the other thread, "it'll be tight, but there will be a lot of love!!" That, and I'd say make sure you have some "backups" planned, especially for the smaller Halls of Sun, Moon and Stars.. Then again, I found when I'd be in the smaller halls usually there wasn't much issues with seating and crowding in those. Unless they put the Delancie panel in one of them, or Ponies Anthology. I remember for those two the lines were SO huge to get in, i just noped right out and went back to party in the room with friends or back to the concert.