"Play Pill
-RH power bat
-His numbers are better than any other player at the position
Seems obvious who should be getting the majority of starts at 1B right now."
I'm sorry antica but buying that Pill is a career .304 hitter in all of 54 major league at bats is more foolish than believing that Belt is always going to hit .220 at this level, the latter could come true unfortunately but the former just ain't happening.
Pill will be 28 by the end of this season. In 6 minor league seasons he's a .279 hitter with a .328 OBP. While that's respectable, expecting those numbers to go up, rather than down in the big leagues is not a smart bet. Belt on the other hand hit .343 with a .457 OBP and it didn't take him 6 years to rise to the level where he was knocking on the big leagues door. If you look at his other numbers they're pretty ridiculous.
Has he gotten it done at the big league level? Nope. Not yet. But if you're calling to trade Belt and rely on Pill to be the answer as the Giants future first baseman in the long run you really need to scratch the surface a little deeper than the 54 total ABs that Pill has, along with the less than 200 that Belt currently owns.
Pill is filling the role that he's earned and deserves, and that's a right hand hitting bat off the bench with the occasional start to give guys rest. No more, no less.