OES has never been performed live since that tour right??
Certainly not to my knowledge. As far as I know, Mark prefers to play On Every Street when there is a pedal steel player in the band. That said, Richard Bennett can play pedal steel! Though it may be that his skills on the instrument don't quite stretch to the kind of soloing that Paul Franklin played on that song during the OES tour.
With regards to Jim Cox, I seem to remember that the Ragpicker's Dream tour was going to be a more cut-down tour in terms of length. For instance, I think the only planned UK dates were MK's usual run of shows at the Albert Hall. Perhaps this was why Jim was part of the line-up for this tour, as visiting fewer locations may have made it logistically easier to ferry him from gig to gig.
I've always found it interesting that the line-up was going to be a little different. Who knows? Perhaps, had the tour gone ahead, the band would be different now. We can but speculate. But whatever the case, the tours since then have just gone from strength to strength. I wouldn't change it for the world!