Yeah it was unusual but probably for the best. Normally he gets up more and KDB hangs back, but today KDB was playing a far more attacking role than last year and David sat deeper like you said.Appears to be playing a slightly deeper role recently. Think his performance was good today, much better than recent matches
I think we're less in need of his creativity than previously with the talent we have, assuming others are up to standard. But he has a calming influence that really bolsters our whole XI when he's in the middle.