Hello Buraddo,
The reason I changed the classification of this way to highway=residential was to carry the higher classification of the connecting highways through the dual carriageway. Looking at this intersection again, I agree with keeping this classified as highway=service due to it’s main purpose (to serve the shopping center) as well as https://www.openstreetmap.org/relation/8308553 preventing traffic from the residential highway from going through the dual carriageway. 

Thanks for reaching out, and I hope you have a great day!