In trying to use the Trackjack's player expectation column, I'm trying to understand what's up with RSO (= Rider Splits Optional), which is said to add a .2% advantage. I found a discussion on another forum where someone explained

"It's only about 0.2% addition to EV when the front player (caller) is sacrificing everything. Otherwise it's much less. It certainly doesn't make the game +EV on its own."

So, if I follow that, the .2 +EV assumes you would have played wrong to begin with. If that's the case, I don't see the usefulness of throwing that into the overall "Player Expectation".

Thanks for any clues, esp. if you can confirm whether RSO is only better assuming you'd otherwise "play wrong", so to speak.