I think the problem we have here is that Mark
was DS. Where most other bands could operate without one of the other members DS could not and indeed the other members of the band (except John) were, for wand of a better word, interchangeable. Ironically, Mark Knopfler
is John and Mike!
I think it's also clear that the new direction his music has taken has cost him many fans and there is still a market for DS songs being played live. Now that Mark has dropped most of them from the set, especially Sultans - which was the song many average concert goers (not fans) actually only went to hear - many people won't even go at all now. MFN, BIA and SOS are perhaps the songs a concert goer would go for if they weren't really a fan so now they won't go to a Mark Knopfler concert but they'll go to a Straits one.
The more rock influenced and faster DS songs always make the atmosphere in the hall far better than the rather bland, sedate flute and whistle inspired stuff of recent albums that send half the hall to sleep. I don't think there's anything wrong with mixing it up a bit. Or what about a longer concert!!!