I'm gonna be jumping into some H2H games in the next week or so just to lab this out to see if will work in H2H, but here's the jist vs CPU.
When user is on REDG at the snap of the ball, if you want to user a LB or DB you push up on the D-Pad at the snap of the ball and user switches to LB/DB.
However, if it's a run play, pushing up on the D-Pad will NOT switch you off the REDG. instantly. There's a hesitation due to the run.
Similarly, on an option play you won't be able to switch instantly using D-Pad and the REDG will freeze in place momentarily due to the option.
Doing this gives you a split second to know it's a run, then you simply hit circle to get to the player closest to the ball.
Now I know that using a lineman is old school and not very popular these days but if this works the same way in H2H it could give a person an advantage if they're getting killed by spamming RPOs.
I'll let y'all know what I discover. ✌️