S.J.
I think we moms have a hard time sometimes letting our husbands do things their way when we are around. We end up trying to "help" them and they start thinking it's better just to let Mom handle the kids while they watch.
So how about giving yourself a break and letting the two of them have Daddy-Daughter time? Whether it's you going to the store while they stay home, or they could go to the park without you sometime. You could stay small just a few hours at a time. My husband loves taking my son out for fast-food pancakes on Saturday mornings. Without Mom there, your husband would have to take a more active role, and he might gain confidence in his Daddy skills!