What the US has now is a free and open market, well the logical conclusion of it. (the carnivorous rats on the island model) The lack of regulation to stop consolidation is a big problem. The need right now is for AT&T to not merge with time warner.
I don't think nationalisation is what is required, I think separation of last mile infrastructure from client ISPs. This means that the Motivation for the infrastructure company is to provide stable reliable last mile connections. Because they are going to be used regardless of who is supplying connectivity, it doesn't affect investment. All of this can be achieved with private companies (indeed thats how it works in most EU countries)
This also lowers the cost of ISP startup drastically.
As for QoS, I love QoS, it means that my ADSL connection can still have low latency stuff (audio, video games) even though I share the same uplink with torrenting arseholes. But, I don't see how, with the weakness that is the FCC, they are going to legally distinguish between QoS to regulate service (ie bulk downloading via torrenting) and bulk downloading of a video on demand service.
Both have the same strain, both are video services, both can be throttled to mask the lack of investment in backhaul infrastructure. both need to be "shaped" to allow customers to use the ISP's "services" evenly.
I'd also like to point out that NN has only been a thing for <2 years.