Because the sort-of-interchange-but-not is spread out, I think the best solution is to keep separate points for both sets of intersections. What I've done is, on WI 73, moved 12/18_E to where new 73 intersects the eastbound off/on ramps, 12/18_W to where 73 intersects the westbound ramps, and then on 12/18, moved 73N/W to those respective points too. I also added the county road intersection south of 12/18 so anyone who wishes to de-clinch this short segment can.