This has been discussed already.
Short summary is that it is (by far) not as severe as outlined by samourai.
The coinjoin itself is secure. No one is able to link inputs and outputs together.
For a more detailed response, read the first page of
this thread.
What exactly is your concern?
my concern as a nontechnical person is to come to a acceptable conclusion; which seems to be achieved. I read the thread; thanks