Use cryptography to solve problems not legislation. Net Neutrality means nothing on Tor because nobody can be identified via their link connection.
Also I'm not talking about using Tor to connect to "regular HTTPS" sites like Amazon or Netflix where they see you as some special citizen of the Internet (one they don't like) I'm talking about things like Hidden Services where there is no external gap between networks being exploited.
The concern is that ISPs will throttle all traffic which they don't recognise as being served from a big-name domain (Netflix, Amazon, Facebook...).
In such a situation, if I use an ordinary https connection to watch my favourite Netflix shows, then they won't throttle me. But if I do anything through Tor, then they will.
This still isn't a practical solution to the problem at hand. Most people want to watch a lot of streamed video, which isn't doable over a Tor-like network in the foreseeable future. Also, it would be impossible to get the support of the internet giants, without which I don't know how you could do this. They've invested a lot into being able to see and analyse almost everyone that's using their service.
Just because the current Internet was built with IP addresses etc. for the 1970's doesn't mean it has to stay that way and Tor has proven you can at least solve the NN problem with onion routing.
You cannot "just slow all Tor connections" when everything is a Tor connection is my point.