[CurlyDave]

High wing design provides more lift thank conventional wing design...

The loss is that the wing structure does not protect the cabin from debris in an uncontained engine event.

[Magnum44]

True, but how often does that happen now?

[Pete from Shawnee Mission]

And is the fuel stored in the area above the passenger compartment?

Aside. If they want to lose weight they need to start thinking about using a weldable lighter weight Scandium-Aluminum alloy. Rio Tinto has a mine in Canada. There is also a mine being developed in Nebraska.