That's about where I would draw the line. Domain registration needs to be regulated or run by the gov't so that it can be protected by the first amendment. Pretty much everything else can be solved by enforcing antitrust laws so as to prevent one entity controlling too much of the space.

The other challenge is DDoS protection. Any controversial site is going to attract large DDoS attacks; if the big DDoS mitigation providers drop a sites that site is either effectively dead, or pushed into the arms of a sketchy "semi state sponsored" mitigation provider like DDoS-Guard.