You have a good point about the states.
It does comlicate the process.
But, at some point MSFT will realize that they are out of runway and begin to make concessions to avoid break-up. The states unanimity of position will at some point begin to crumble. No one will proclaim that a MSFT break-up is a goal in itself. Only the goal that MSFT end certain illegal monopolistic practices and begin other practices or actions, e.g. no bundling of products, no pre-announce of products, public disclosure of interfaces, etc.
After a majority of states gets it's pound of flesh, the rest will fall in place. Perpetual bickering would only help MSFT because they could continue with their behavior.
Alex
Only two things are certain: the universe and human stupidity;
and I'm not certain about the universe.
-- Albert Einstein (1879-1955)