In Louisiana, the Lt. Governor is really only the tourism director for the state. He really has no activities outside of that area.
The biggest problem with Blanco was that she was the former Lt. Governor. Unlike most states, this position has nothing to do with the job of governor. It gives a false indication that the person has been in a position that would prepare them for the governorship. The Lt. Governor is simply a glorified tourism director.
If old Mitch moves into that big mansion in Baton Rouge after Kathleen abdicates, we should expect more of the same. It's like taking the marketing director and making him CEO. That usually spells disaster. These people know how to sell but they can't make decisions - they make deals.