It looks like we’re getting some new adversarial modes as well with this update. From the article:
In addition to the new vehicles and customization options, Lowrider adds three new adversarial modes. Keep the Pace borrows from Speed, forcing players to stay above the minimum velocity or explode. Offense Defense is an asymmetrical mode with runners racing toward the end of a route while protectors try and stop them. Relay takes us back to grade school field day as team members run laps and pass the proverbial baton to another.
All of that and more info at the link above.