I swap Bitcoin and Monero all the time and never have trouble with with liquidity. It's the highest volume on Bisq even over fiat currencies
As long as you ideally use Monero directly, or at least swap back to Bitcoin at different times and amounts its work fine as a "mixer"
The tracing thing is FUD. It's always because they incorrectly swapped to a transparent chain/fiat/exchange or messed up their opsec somewhere else.
The best largest coinjoin right now, Wasabi, has caveats like not offering as good privacy for the largest inputs, smaller anonymity set especially for receivers, and fractured pools because it's liquidity isn't shared between coordinators
