I understand what your saying matt but remember in batman begins bruce left gotham for 7yrs at the start of the film we see him in jail and he takes on 6 prisoners showing alot of fighting skill which is something he never had when he left gotham so this leads me to wonder what else happened to him between the time he left gotham and the time he met the ninjas.
For all we know he was out there training with all sorts of other people, as for his detective skills well as this is the start of his adventures i would expect that to develop or the sequals after all he cant be that great at the start or it would stop the films progressing into the batman as we now know him.