For me, PB value puts way too much emphasis on plate appearances and/or IP.

It has to. You are looking for the total value of a player over the full length of a season. Its based on every team being in the league.

We only play with 20 or 24 teams so having players with lots of at bats doesn't quite mean the same. We can platoon, we have deep benches.

You also forget Kent loses value due to playing in Houston.