I have an idea: Organize the quarterfinals by types of acts. Here is an example for this year:
Week One: Singing
Edon, Nikki Jensen, Shanice & Maurice Hayes, Danielle Stallings, Big Barry, Tim Hockenberry, Inspire the Fire, Jake Wesley Rogers, All Beef Patty, Ulysses, Sebastian, Eric & Olivia.
Week Two: Dance
Lil' Starr, The Scott Brothers, 787 Crew, LionDanceMe, Turf, Lisa Clark Dancers, The Untouchables, Elusive, Light Wire Theatre, All That!, Unity in Motion, Lindsey Norton.
Week Three: Danger, Magic, and Juggling
American BMX Stunt Team, Donovan & Rebecca, Ben Blaque, Cristin Sandu, All Wheel Sports, David "The Bullet" Smith, Horse, Jarret & Raja, Hawley Magic, Spencer Horseman,Eric Dittleman, Rock Star Juggler Mike Price
Week Four: Comedy, Bands, Art, Instrument-Building, and Animals
Todd Oliver, Tom Cotter, Jacob Williams, The Distinguished Men of Brass, The All Ways, Wordspit and the Illest!, David Garibaldi and his CMYK's, Aurora Light Painters, Joe Castillo, Micheal Nejad, William Close, Olate Dogs
Doing that would even out things a lot. It would really help acts who are not singers or dancers.