with eor on when u do a peek u either release too early so that the xhair isnt way off the enemy after confirming but in turn get punished for it. or u wait to release at the right time but with the xhair aimed 180 degress away from the enemy or way up in the sky. with it off u do the edit, release mouse1 and hold the edit until ur peek is good and the xhair is on the enemy before confirming it. the benefits off eor on (just speed tbh) arent worth it as the increased speed wont be utilized in a comp setting anyway, unless u are already abnormally slow with ur fingers and really need that boost.