You need to finish so it can pay you out for the laps you have done plus it’s really quick to just select Race Next Rival and you are back in the pits in seconds.
I sort of like the way it’s setup as you don’t have to go all the way back to the main menu to choose a different class thus the game won’t crash, the only issues you could run into is when you want to upgrade a ride to another class and then it’s back to the main menu.
For Rivals practice, I typically do my testing & tuning in Free Play Test Drive to get my car dialed in for a leaderboard run because it’s a lot quicker & easier to do quick tuning adjustments in Free Play Test Drive.
Yeah, pretty obvious thing to do. From my perspective, it’s not just the time taken to re-start. It’s the fact you lose your split times and have to start again from scratch.