The way I read it, it sounds like they are saying: "Yes we will still pay you $8M... if you deserve it."
Base pay comes down from $8M to 4.X and incentives are available to take him back up to 8. Also the buyouts are very low so it is apparent they are putting him on a short leash and Harbaugh is looking to prove himself.
I thought for sure he was going to get fired but I'm glad Michigan seems to not be overreacting to one horrible season and still no wins against Ohio State in probably its most dominant decade of football history.
Go Blue!