It's a field issue, which means that players have the option to wear different cleats to make up for a firm or soft field, instead of trying to find another facility or share Vegas' stadium. Wearing different cleats seems a lot more pragmatic than the logistical mess of changing locations of where you practice a week out from the game.
To
@NewbZor and I's point, it is a league issue and they should have made sure that UNLV's field wasn't shit-tier. It's just more stupid "the game is rigged" bullshit that I really get tired of