A few months ago, The New Yorker published an article by Graeme Wood, an editor of The Atlantic, about the Afghan National Police. (If you haven't read it, you should.)
For an update on the development of the Afghanistan army, perhaps you should consult this video, narrated by John McHugh, a reporter for The Guardian. (You can read all his dispatches here.) According to him, "US soldiers view their Afghan counterparts as ill-disciplined, badly led and with a crippling taste for hashish."