(...) Using centralized mixing services never made any sense to me because of that.
Could be, but I don't recall ever hearing about anyone being prosecuted based on evidence from government controlled mixing services.
Decentralized services will be available anyway. Not every dev lives in a country they can reach. Can they get to a dev that lives in Russia for example? I don’t think so but this time your data will be in the hands of Putin.
Sure, but now any potential developers will have to take special measures to remain anonymous when working on any decentralised exchange, mixer of any sort or coin/token with anonymity feature. Even if they're not based in EU, the thought that you might get arrested anytime that you set foot in any of the EU countries is not going to be pleasant. And most people appreciate the option of traveling freely and would not be happy to give that away.
And from users' perspective, there's a risk of coins suspected to be mixed to be red-flagged by crypto-businesses, depending of how deep of a surveillance they'll be expected to do.