I expect exchanges will be told to drop privacy coins as the price of doing business. That's already happening in Japan and South Korea.

As for mixers, any law enforcement agency determined enough could probably pin countless dodgy monies going through mixers so if the will was there all of them will get nailed if they can be found.

It's possible in future there may be sanitised mixing services created purely to break the link between old addresses for gamblers in the right jurisdiction and people who simply don't want all their transactions to be linked.

The future of mixers open to all may not be a long lasting one. Even if they continue to operate with impunity it's possible third party services will reject coins that are identified as coming from them.