As I understand it, they were pulled because employees would drive in a very unsafe manner in order to meet the guarantee and not get penalized/chewed out by their boss. I think somebody died...?

Yes. There was a lawsuit after a fatality. The delivery driver was a witness against Domino's.

They now have a satisfaction guarantee. If you call and say it was too slow, you'll be calmly told they don't offer a time guarantee, but if you were, for example, dissatisfied with your oder, you get free pizza.

It is as good as a guarantee in Tokyo and Osaka. Unless you pick somewhere 10+ minutes away by bicycle, motorcycle and car. The restaurant leg is typically sub-10 minutes.