What I'm planning on doing for "value over replacement" is simply going down the list and removing player X from a roster - my spreadsheet will automatically recalculate starting line-ups and all-play wins, so I can then compare all play wins with and without player X. With that, you can see the impact that a given player has. For example, looking at the data right now, (partway through round 11), gheemoney has 124 wins. If he did not have Chris Johnson, he would have 68 all play wins - CJohnson therefore was good for 56 wins. If I removed Dwayne Bowe, on the other hand, Gheemoney had 114 wins, so Bowe contributed to 10 wins. Likewise, Orton contributed to 35 wins, and so on. Basically, it's value over replacement where the replacement is someone all ready on your roster...That's why it's important that everyone have a back-up QB and TE.