It hurts me to say this, but I think you probably could make a solid argument that Molina could have been the MVP.
I am going to go shower for an hour and a half now. I feel dirty.
Mike, Posey spending time at first base and Molina being quite a bit better as a defender is the argument I would make that would draw the two together.
"The other important point to make here is that you’ll notice that catchers have no values entered in the Fielding portion of their Win Values. Evaluating catcher defense is something we’re simply not very good at right now, and while there are strides being made (including a great article by Tom Tango in the 2009 Hardball Times Annual), there’s a lot of things that we haven’t figured out how to quantify yet. So, we’ve just left catchers alone, ranking them all as league average, and will let you all adjust their final win value however you’d like to reflect their defensive value relative to other catchers.
If you think Joe Mauer‘s catching abilities and leadership are worth one win, just add one win to what we display as his win value here. Quantifying catching defense is something that we just haven’t figured out yet, and so we’re not pretending that we have. Consider it an opportunity to fill in the blanks. "
Since fangraphs calculates it's fielding WAR based on UZR and there is no such thing as UZR for catchers, I tend to give catchers more lattitude in the WAR area (at least on fangraphs). It's simply a difficult position to see what kind of value they add to their team. That's why I find what Buster Posey did this season amazing. He lead the NL in WAR at a position that WAR has a hard time determining with full accuracy.
You could convince me that Molina was extremely valuable to his team (maybe even the most valuable), but he certrainly wasn't the best player in the NL last year.