Besides privacy problem which already discussed, there's also concern about "auto-coinjoin" feature. I expect few user wont even realize their coin is mixed and blocked when they deposit it on CEX. It's also weird user no longer can choose UTXO for coinjoin process.
Let's see how everything will work now, maybe we can use wasabi in some cases and test if it's working with coins coming from mixers and gambling, or it will be rejected.
It's something like litmus paper test for coins

Great idea! I'll probably build a review campaign based on this idea.
It'd be interesting how reviewer react about "auto-coinjoin" feature.