Probably deleted since OP is a recurrent concern troll - https://nitter.cz/PavelTheCoder/status/1647970679805947910#m

These are both non issues.

1 - Both Samourai and Sparrow tell you the size of your change output prior to signing and broadcasting Tx0. If you don't want to create a change output of this size, then you go and edit your transaction. This is the expected behavior of any good wallet.

2 - Tx0 clearly pays the coordinator, and this output is easily identified. The privacy of Whirlpool coinjoins does not depend on this fee payment being secret. It does not matter if you and I both pay to the same coordinator address - there is zero loss of privacy.