Then perhaps, if the airline has the route structure, "long haul" crew members should be given short haul assignments on a regular and continuing basis? 2 months long, one month short?
The aircraft they're on are long haul aircraft and moving to short haul means a different aircraft. You can't hop aircraft types and routes are bid on by seniority which you don't violate.
And before a debate on the complexities of such an approach (pun intended) begins, if the skill in visual approaches is perishable, but necessary, then a bit of effort overcoming "complexity" might be worthwhile. Otherwise, it's an exercise in "you can't get there from here", which solves nothing.
Does it cost more to accomplish? Yes? Not going to happen. Not unless its mandated.
In an occupational field where high flying hours is regularly touted as a badge of high skill and experience, isn't it a bit embarrassing to admit that the long haul folks, usually very high hour crew, have the least recent and refreshed skill in a very basic maneuver that is a requirement for even a Sport Pilot License - a visual approach?
Ironic, isn't it.