Why would onchain deposits go to the fedimint? I find this confusing an unexpected. I think most if not all users would expect onchain to always end up in your own wallet. This seems likely to cause confusion and drive extra fees to move a second time to true self custody. 

 We're a lightning wallet primarily. If someone adds a fedimint and isn't using a node or on chain wallet, they should expect the funds to go to the fedimint.

If you don't want funds in a fedimint, don't add one.