It certainly would be preferable. That's the ideal solution: treating everyone the same. Then there can be no argument that police are using it as a ruse to pull people over or further other investigations. It would take that distasteful notion right out of things. But we would need to see how it plays out on the ground, because one of the reasons that RIDE checkpoints passed the constitutional test is because of the invasiveness and the brevity and things like that.
The same is true when you're looking at screening devices for drugs. We don't really know how long a saliva test is going to take, or we don't really know exactly the mechanics of it. If everyone is stopped at a RIDE checkpoint on a busy New Year's Eve, and it extends the detention of everyone at that checkpoint by 30 minutes or an hour and now it's not just a brief stop at a checkpoint but a longer stop at a checkpoint, then that might change the constitutional analysis even under that scenario.