The weakness that if you use Wasabi, you can no longer use bitcoin as it was designed - peer to peer with no third parties. You can't do this because you have to ask Wasabi to ask Coinfirm for permission to spend your coins in the way you want. If Coinfirm decide you are a naughty child, then you are censored. This is obviously a significant weakness compared to other coinjoin implementations.

A typo. Fixed.

He was specifically asking what Coinfirm do with the data Wasabi pay them to gather on your UTXOs. Whether or not Wasabi is open source is utterly irrelevant to this question. As usual you are answering completely different questions to what is actually being asked because you aren't honest enough to give the uncomfortable answers.

Coinfirm are a blockchain analysis company whose entire purposes and entire existence depends on gathering and selling data. Any data Wasabi pay them to gather will be used for any other analysis they want and sold to any other third parties they want.