Air and moisture barriers; a general question – GreenBuildingAdvisor

Other than convenience of construction is there any reason not to have the air / moisture barrier immediately behind the drywall? 

I realize air sealing around electrical and plumbing penetrations may require additional diligence but if the assembly meets or exceeds full wall and roof R-value for a given climate zone, and is vapor-open to the exterior, is such an assembly system workable?

If okay I would like to try a test build with inbaord sheathing with an inboard side liquid applied barrier. 

Do you have any thoughts or experience with this kind of system?

See attached drawing

Thanks in advance.