A wish state not a wish list - the terms differ in their meaning and useage.
OC, please expand. A state would imply a temporary or ephemeral condition, whereas a list would imply more permanence.
Some are advocating that the side stick was a factor in the accident because it was unobservable for example. But there are examples of where an accident has happened despite the yoke position being visible. We have to be careful in advocating a solution as a pancea to an issue.
"Panacea" is a value judgement by you. Let me restate my point.
You have no evidence that having linked controls does not improve safety in dual piloted aircraft.. No one has recorded the accidents
prevented by using linked controls, therefore there is no data. All you are stating is that accidents have happened in both non-linked side stick and linked control system aircraft. All we have are statistics showing that both linked and non linked control systems have a very good safety record.
Linking controls gives one the opportunity to monitor control inputs by tactile means, and if necessary, to assist or out vote the other guy. How is this additional capability a disadvantage?