i havent read Ronin in years but from what i remember it was pretty good storywise, i think the art was crap though...
This was the point where I started losing interest in Frank Miller. He went from really nice art on the first 12 or so issues of DAREDEVIL, to losser and more minimalist art.
When he left DAREDEVIL and started doing RONIN, I thought the first issue was spectacular. The remaining 5 issues came out very sporadically, and far from developing a more original style, his art devolved into a hybrid cloning of styles by Moebius, and Japanese LONE WOLF AND CUB artist Yoseke Kojima.