Bryan has mentioned in interviews that he has had some back problems, I'm sure he had a fall from a bike whilst on holiday 4-5 years ago.
It could be part of the reason for him being seated at the piano a bit more on these tour dates but I think since he started to do the differerent arrangement of IEDHAH with more piano it is just the way he does it now. Perhaps he is giving more centre stage to the other musicians and adding more piano to the mix as he did in the old days. Perhaps the fact that the piano & keyboards are set to the side of the stage is more down to technical arrangement rather than hiding Bryan out of sight.
