I can’t think of a single instance in the last decade where an editor wanted a discrepancy between the left/right channel as laid in on two mono tracks (split stereo). And I can’t remember a single time where I wouldn’t have been able to quickly create whatever that would have been myself. Come to think of it; most engineers I know prefer to “nuke” the editors settings anyway, be they panning or levels, because they generally a) know less about audio, and b) have been forced to screw it up through last minute changes forced on them.
In short; I never encounter any situation where there is stereo material on two tracks and L/R differ and should differ, and I never encounter any situation where whatever was different couldn’t have been recreated (duh) quickly.
But perhaps you can give us an example or two.