I think that if they showed all that detective work training in BB, then not have him hardly use any of it would have been pretty pointless. He didn't need to use THAT much detective work in BB.
BUT I think they should, and easily could, show some flash backs of him learning detective work in the Dark Knight, it could strengthen his character as a guy who knows his stuff and/or strengthen on screen his relationship with Gordon.
But saying Batman Begins' 2nd half was just a bunch of hollywood crap is lame--it was classic Batman.
And I think it's pretty obvious they are gonna spice it up a bit for this sequel, do you really think Nolan is just gonna throw out some straight forward flick?