I think one issue with that is that if you don't make him of Herculean will, you wind up with him dropping the cape and cowl every time the writer wants to Make An Impact, and then going through the whole rigamarole of deciding to put it back on.
Batman's done that a little, but the real offender is Spider-Man. The variants of "I'm tired of this, I'm gonna give living normally a shot" wind up far more tired than extremes of drive and will, after awhile.
Though I'm not a huge fan of turning Batman's drive to fight crime into psychosis, it's still better than being wishy-washy. I could do without him considering ditching his quest to bring justice to Gotham every time he meets a new Girlfriend Of The Storyarc.