Like I said before, I feel Batman being a detective is absolutely vital to the character, regardless of the medium he's portrayed in. You take that away he might as well go into action without his cape. I guess that's another thing we're going to have to disagree on.
You have to keep in mind, though, Year One was exactly that: a story that chronicled an entire year. If he didn't improve in that entire time, he might as well've just hung it up or wait for Alfred to show up with a shotgun the next time he went off to face The Penguin.
See, even if I don't think the character is all that likable (my favorite version is Greg Rucka's and his was a giant dick) I at least have to like the character, you know what I mean? Rucka's version was a dick because of his mission - to protect Gotham at all costs. Johns' version, well, he seemed to just be lashing out. Kinda temper tantrum-ish, quite frankly.
Like I said before, I did enjoy the book, it's just questionable how worth my money I felt it would have been without Gary Frank's superlative art making up for Johns' shortcomings.