I think that mixers aren't the problem, but the criminals who use them (with are just a small part of their users).
Sadly, privacy is becoming harder and harder to achieve just because this anti money laundry war doesn't care about citizens rights for privacy.
Mixer is just a service in this market, and it can be abused by criminals. Cash, gold, traffic routes, and weapons can all be abused in this way, we do not ban people from using these things, but we find ways to manage them.
This new proposal related to Mixer could make it impossible for Mixer to continue to exist strongly in the market, meaning that criminals will lose many tools for money laundering. However, its negative impact on users and the crypto market may be even greater, hindering the market and infringing on the ownership and use of crypto assets by many people: it would be unreasonable for someone who is completely innocent to have their assets frozen just because a few satoshi in their account was related to Mixer years ago, when he has never used Mixer.
I don't think privacy is an issue in this event. This proposal is just a rush in the effort to manage the crypto market and fight money laundering!