Hey, the US doesn't OWN all of 'offshore', or even Gulf of Mexico, you know! If BP wanted to do something silly again, they could dodge any and all regulation, by simple selection of a foreign drilling site.
But, BP won't do something silly again. Not for a long time. BP will, for purely profit-seeking reasons, manage better in future. BP employees, for their own personal safety, will be more inclined to caution and prudence.
The best thing the US government can do, is to insist on full disclosure of any and all safety-related information, that could be of use in future planning (including regulation) by any and all persons, anywhere in the world, The courts (not regulators, not legislators) did perform that function, I hope adequately. BP cooperated, responsibly (IMHO).
The author of the article clearly wants restrictions on 'them', as a kind of punishment for a criime, even if it means some kind of ex-post-facto criminalization. He's missing the productive possibility of doing things better, because he wants to see someone's time wasted in a public pillory.