Re: Wilkin Castillo
I'm not terribly impressed. Position flexibility is not a substitute for actual production.
Now, the fact that he can catch certainly helps -- especially if it keeps us from otherwise carrying 3 catchers. But if you have to use a regularly use a guy who OPSs .600 and doesn't play top notch defense, you're already in trouble. So having him be able to do it at a number of different positions doesn't really add any value. And not having him around doesn't hurt you.
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.