@lacsap I think what the OP meant is if 2 fields could be running matches side by side, the time per match would decrease greatly. With enough fields and volunteers to reset everything, 2 matches could be played every 3 minutes. With 48 teams as you mentioned (which is quite a large qualifier to be fair), it would take 12 qualification matches for each team to play once, which would take just 18 minutes. This means for every team to play 10 qual matches, it would take just 180 minutes, or 3 hours. Adding an hour and a half for lunch and alliance selection (much more than is normal), we’re up to 4.5 hours without elims. Then, with a bo3 R16, QF, and SF bracket, and a bo5 final, assuming every single group of matches goes to the maximum number, there would be 24 r16 matches, 12 QF matches, and 6 SF matches, for a total of 42 matches and 63 minutes (just about an hour). Finals matches cannot be played on different fields, but even with 5 finals matches, it would take just 15 more minutes. That means the tournament in total would take under 6 hours. You arrive at 8 AM (later than normal), run check in and inspection for 2 hours (much longer than normal), and the whole tournament is over before 4 PM (much earlier than normal). Instead of 7-5 or 7-6, your tournament is now 8-4.
Now, are there downsides to this? Absolutely. A mentor with several teams could have 2 teams competing at once. We would need 4 fields instead of 3 and 2 head refs instead of 1. It would also give teams just 16 minutes between matches instead of the usual 20 or 30 minutes. And yeah, there would need to be a lot more volunteers.
That said, the benefits are massive and undeniable. @536Mentor you can’t imagine sitting through a 1v16 bracket with more than 1 match? Imagine sleeping in an extra hour and getting an extra 2 to joyride or hang out with your family before dinner. If the tournament had 32 teams and lunch didn’t take so long, you could squeeze out another hour. And as an added bonus you would be a lot more certain the best team won. Which apparently isn’t a goal of vex but is always nice to know. 
@OscarMNOVA12 with respect, if you hate watching legendary teams compete, maybe you shouldn’t be an EP. As a student though, the US Open elims were absolutely spectacular. I got the chance to face 185A and 400X in NBN, watch 185A vs 974X, watch the hyped 60X fall in quarterfinals, and just see some spectacular game play all around. The Us Open Elim bracket was hands down the most fun I’ve ever had at a competition I knew I had no shot to win. Maybe to you it’s boring, but 2016 Us Open day 3 was one of the best days of my life.