Re: Paul Janish. Why doesn't he have enough bat for MLB SS?
I believe he does have "enough" bat -- that is, he can be a replacement level bat with .750 OPS upside. He makes frequent contact, good plate discipline and doubles power. His glove will make him a decent, if not quite league average player, even if he doesn't hit up to his potential.
Games are won on run differential -- scoring more than your opponent. Runs are runs, scored or prevented they all count the same. Worry about scoring more and allowing fewer, not which positions contribute to which side of the equation or how "consistent" you are at your current level of performance.