But won't this lead to pressure from the authorities on the Trezor team, as it was with Tornado Cash?
Probably not since they're with Wasabi, they might impose the same regulation that censors some UTXO.
For more info about that topic, refer to these threads:
Yes, you're right, because in fact the CoinJoin protocol is centralized and does not really guarantee complete anonymity of transactions, so speaking of anonymity, Trezor developers get an additional tool for accessing the list of users and their IP, as well as the possibility of blocking.