If you leave the vesting to the compensation committee then they will be tempted to give immediately vesting stock to star recruits. For instance, 50% vests immediately and the other 50% over a regular basis
I think AMD is going to give these star recruits a signing bonus one way or the other. With this plan they can now use stock options instead of cash. That is a good tradeoff if you ask me. I'm voting for the plan.