I understand what you are saying but from where I sit, the rule change provides a lot more upside for a school like WSU than it does for a school like Alabama or USC. I looked at Alabama's official website and they had 29 guys on their entire roster that redshirted. We had 57. For Leach to be able to allow those 57 guys up to 4 extra games in their careers could have a huge potential upside for us. And Alabama isn't going to suddenly redshirt a bunch more guys because in their world, they are always recruiting that next top ranked class. They can't afford to redshirt too many guys because it might impact their ability to get a full class of the next round of studs.
FWIW, schools like Alabama would likely go the other way with the four games and send out their redshirted studs against the bad teams on the schedule to give them experience in games where the outcome is positive.
I do like the comment above that players are allowed to play in up to 48 regular season games in their careers.