It is overreach, but I think it would be naive to deny this is the direction things are headed.
It is absolutely the way things are headed, much to my disdain and much to the detriment of individual users and the entire bitcoin ecosystem. Unfortunately, it seems the vast majority of users are quite willing to continue to subject themselves to the iron grip of centralized exchanges until it impacts
them personally. They see the stories of withdrawals being denied, of coins being seized, of accounts being locked, but ignore it all and continue to use these exchanges. It seems to only be when someone actually loses their own coins that they finally make the move to a decentralized exchange.
This is actually one of the reasons I prefer ChipMixer to CoinJoins. The latter are too obvious on-chain, at least when using popular methods like Wasabi Wallet.
Not sure I follow your logic here? Although it is impossible to
link coins which have come from ChipMixer with coins which have been sent to ChipMixer, it is trivial to
identify coins as having come from ChipMixer, given their very characteristic chip creation transactions. If an exchange wanted to ban all deposits from ChipMixer, they could do easily.