This topic came up in another thread - the desire for the Eagles to perform just as a quartet, like they used to do in their earliest days (by The Long Run tour, they were being joined onstage by the likes of Joe Vitale, Jage Jackson, Vince Melamed and Phil Kenzie so they haven't been "bare bones" in quite a while).
But I just can't see it. Can you imagine them doing Hotel California as a four-piece, for instance? While it's true they could probably cut down on the backing band - is more than one keyboardist really necessary? An entire horn section? - I really don't think it's possible for them to play some of the current songs in the set as a four piece and have them sound like the original.
Even expecting Don to play drums on all the songs is a bit much, considering he is doing solo songs. For those solo numbers, he didn't even play the drum parts on the original album versions!
I do miss Glenn on the keyboards on songs like Desperado but I guess playing piano/keyboards night after night is pretty taxing.