I'm interested, Chris; although I'd be more interested if owners could not keep using the same year of a star player every season.
You'd have to do more serious scouting and consider the long term if you knew a player's WIS season would change each new season. This would also prevent an owner from sitting on the best single season for Pujols or A Rod or Ted Williams for season after season. One-season wonders, such as Felipe Lopez or Brady Anderson, would have less value.