I had the XFL game last night on while I did things around the house. This game is much, much, better. MLS stadium is a perfect venue for these games. Vegas has a Mickey Mouse setup in a defunct minor league baseball field and it effects their play.
Vegas easily has the worst stadium in the league - a former minor league stadium that was converted into a soccer stadium... but even 6 years later the grounds still look like they were playing baseball on it a few months ago. Honestly wondering why they couldn't get back into Sam Boyd Stadium like the original Las Vegas Outlaws once played in.
Arlington is also playing in a former baseball stadium, but it was formerly the home to the Rangers so has much more in the way of amenities, and they seemed to take much greater care in converting it.
Besides DC, who plays in an MLS stadium that also works well for football, everyone else plays in stadiums built to play football... including some current and former NFL stadiums.