I can't answer YES or NO because the right recommendation for a couple depends on the couple themselves. Also, Joint Account is a VAGUE term.
First what do you mean by JOINT ACCOUNT? That must be well defined and also the goal of having such an account.
However, I believe that a Christian couple should have JOINT PURSE!
That means, they should be one in their finances. Both should disclose their income and jointly agree on how it should be spend.