That sounds great, but can you really stop the people from using centralized exchanges and centralized altcoins? I don't think so.
Can you really make BTC mining more decentralized by redistributing the hash power among a bigger pool of smaller miners? I don't think so.
It's cool to play the role of a "decentralization maximalist", but most things that you want to change are almost impossible to be changed, because there won't be any consensus among the crypto community. The people are free to use whatever crypto services they want(at their own risk).
You cannot repair the chinks in the armor without using lower-quality mail!
*I am no blacksmith however, so I might be wrong.
The best option is to just forge a new armor. With plate mail or something. In the metaphor with cryptocurrency that would be to make a privacy coin.
Fortunately for us, this has already been done. It is called Monero.
No, I am not shilling for Monero. Just pointing out that it exists. And it is apparently immune to legislation and cannot be weakened by it.
I see BTC <=> XMR atomic swaps becoming a thing.