I was thinking about this on the way to work today (walking and talking to myself - I know, first sign of madness!).
There's no doubt that the concerts miss something if he cant play sultans, tr, and wont play tol (understandable noble reasons). It lacks the defining crescendo.
However I think there is still room for him to tour. I'd like to see him tackle some of the great songs that were never, or only occasionally played live. There are loads of candidates from both DS and solo, Mans to strong, Hand in hand, Portobello Belle, and some of the more atmospheric solo stuff like Sands of Nevada, So far from the Clyde, Gas and TV, I could go on....
I'd certainly pay good money to see a show with some unusual/unplayed gems...