I drove the realigned US 219, and re-drove what is now signed as US 219 Business on the old alignment, earlier today on my drive home from California. (More on that much later, a lot to recover from after about five weeks on the road.)
Some technical points, reflected on what's in OSM which is consistent with what's on the ground:
-- The southern junction of the business route with the new US 219 alignment is at the new roundabout just north of I-68. I think that will need a separate point, even though it's in the footprint of the I-68/US 219 interchange.
-- US 219 as realigned has only a grade-separated crossing over US40Alt, no connecting ramps. You need to take the business route to get from the US 219 mainline, or I-68, to US40Alt. As shown in OSM, the US40Alt/US219Bus intersection, IIRC, has not become a roundabout (nor, IMO, does it need to be), contra what was suggested on the AARoads forum.