overall rating should include everyone. but there should be some setting that allows you to see somebody's roster with walk-ons excepted without having to do it all by hand, possibly like what hogstench is suggesting. Building it off the compare tool does allow for interesting possibilities--if you can choose which guys get excepted, you might be able to pull up a view of just the other team's starters, or just their players who get more than 10 MPG, or something like that. This doesn't really change gameplay in any way, but it's a very nice (possibly aesthetic, but nice regardless) gameplanning tool.