Alan,
I thought about seeding based on record, but MLB and the Players Association have both stated in the past they want to place value on winning your division (which is why we have the current seeding process in the playoffs). While not out of the ordinary to have 1 or 2 wild cards with a better record than a division winner, I think all three better than the division winner is a bit more rare.
This year the in the National league none of the wild cards had a record better than any division winner, so the results would be the same under either model:
Atlanta 104
Los Angeles 100
Milwaukee 92
Philadelphia 90
Miami 84
Arizona 84
Atlanta 258
Los Angeles 260
Milwaukee 274
Philadelphia 280
Miami 294
Arizona 296
Thank you for sharing your thoughts. I hadn't thought about using the win/loss record to compare this issue. I may try to run the numbers over more postseasons.